Bibliographies thématiques / Transition Metal Complexes - Organic Reactions

Littérature scientifique sur le sujet « Transition Metal Complexes - Organic Reactions »

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Publié le 7 septembre 2023

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Articles de revues sur le sujet "Transition Metal Complexes - Organic Reactions"

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Sanz, Roberto, et Raquel Hernández-Ruiz. « Dichlorodioxomolybdenum(VI) Complexes : Useful and Readily Available Catalysts in Organic Synthesis ». Synthesis 50, no 20 (5 septembre 2018) : 4019–36. http://dx.doi.org/10.1055/s-0037-1610236.

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Molybdenum(VI) dichloride dioxide (MoO2Cl2), and its addition complexes [MoO2Cl2(L)n; L = neutral ligand], are commercially or easily available and inexpensive transition-metal complexes based on a non-noble metal that can be applied as catalysts for various organic transformations. This short review aims to present the most significant breakthroughs in this field.1 Introduction2 Preparation and Reactivity of MoO2Cl2(L)n Complexes2.1 Synthesis and Structure2.2 Reactivity of Dichlorodioxomolybdenum(VI) Complexes3 Redox Processes Catalyzed by MoO2Cl2(L)n Complexes3.1 Deoxygenation Reactions Using Phosphorus Compounds3.2 Deoxygenation and Hydrosilylation Reactions Using Silanes3.3 Reduction Reactions Using Hydrogen3.4 Deoxygenation Reactions with Boranes and Thiols3.5 Reduction Reactions with Glycols3.6 Oxidation Reactions4 Ambiphilic Reactivity of MoO2Cl2 4.1 Amphoteric Lewis Acid–Lewis Base Catalyzed Reactions4.2 Lewis Acid Type Catalyzed Reactions5 Conclusion and Perspective
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Calter, Michael A. « Transition Metal-Catalyzed, Asymmetric Reactions of Diazo Compounds ». Current Organic Chemistry 1, no 1 (mai 1997) : 37–70. http://dx.doi.org/10.2174/1385272801666220121184444.

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The past ten years have seen impressive advances in asymmetric synthesis. This review summarizes the recent advances in a particular set of asymmetric reactions, the reactions of diazo compounds catalyzed by transition metal complexes. Additionally, the emphasis of this summary is on reactions wherein the induction arises from a catalyst or an auxiliary, rather than some inherent asymmetry of the substrate. The covered reactions fall into two reaction types; cyclopropanations and insertions. The cyclopropanation section of this review describes how high stereoselectivities are possible using either chiral auxiliaries or various metal complexes. Both these strategies are effective for producing optically-enriched intermediates; however, the use of catalysts to control the stereochemistry of the cyclopropanation reaction is much more common than the corresponding use of auxiliaries Workers in the asymmetric cyclopropanation field have primarily used Cu(l) and Rh(ll) complexes as catalysts for these reactions, although several complexes of other metals do afford high asymmetric induction. Both inter- and intramolecular cyclopropanations afford synthetically useful selectivities. The insertion section of this review summarizes recent advances in the use of auxiliaries and catalysts for controlling the stereoselectivity of the insertion into various bonds. Insertion into C-H bonds are by far the most intensively studied, although there has been some success with asymmetric insertions into 0-H, S-H, Si-H and C-0 bonds. Complexes of Rh(ll) are almost universally employed for asymmetric insertions. As in the case of cyclopropanations, both inter- and intramolecular insertions can proceed with useful selectivities. Again, catalyst control has proven a more versatile way to control absolute stereochemistry than auxiliary control.
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Bruce, Michael I., Mark G. Humphrey, George A. Koutsantonis et Brian K. Nicholson. « Reactions of transition metal acetylide complexes ». Journal of Organometallic Chemistry 296, no 3 (décembre 1985) : c47—c50. http://dx.doi.org/10.1016/0022-328x(85)80383-1.

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Reznikov, Alexander N., et Yuri N. Klimochkin. « Recent Developments in Highly Stereoselective Michael Addition Reactions Catalyzed by Metal Complexes ». Synthesis 52, no 06 (3 janvier 2020) : 781–95. http://dx.doi.org/10.1055/s-0039-1690044.

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Achieving high enantioselectivity and diastereoselectivity simultaneously­ is a rather challenging task for asymmetric catalytic synthesis­. Thanks to the rapid development of asymmetric transition-metal catalysis, significant progress has been made during recent years in achieving highly enantio- and diastereoselective conjugate addition reactions with a diverse combination of Michael donors and acceptors. This short review surveys the advances in transition-metal-catalyzed asymmetric diastereoselective Michael addition including diastereodivergent catalysis developed between 2015 and 2019. The review is divided into multiple parts according to the type of nucleophiles involved in the reaction.1 Introduction2 Addition of Functionalized Ketones and Dicarbonyl Compounds3 Addition of Aldimino Esters and Their Cyclic Analogues4 Addition of Indolin-2-ones5 Vinylogous Michael Reactions6 Other Michael Donors7 Cascade Reactions Initiated by Michael Addition8 Conclusion
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Arisawa, Mieko, et Masahiko Yamaguchi. « Transition-metal-catalyzed synthesis of organosulfur compounds ». Pure and Applied Chemistry 80, no 5 (1 janvier 2008) : 993–1003. http://dx.doi.org/10.1351/pac200880050993.

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Rhodium complexes are efficient catalysts for the synthesis of organosulfur compounds. They catalyze the addition reaction of organosulfur groups to unsaturated compounds, the substitution of C-H with organosulfur groups, and single-bond metathesis reactions. They cleave S-S bonds and transfer the organosulfur groups to various organic and inorganic molecules, including alkynes, allenes, disulfides, sulfur, isonitriles, imines, diphosphines, thiophosphinites, hydrogen, 1-alkylthio-1-alkynes, thioesters, and allyl sulfides.
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Bruce, MI, et MG Humphrey. « Reactions of Transition Metal σ-Acetylide Complexes. XIII. Alkylation and Related Reactions ». Australian Journal of Chemistry 42, no 7 (1989) : 1067. http://dx.doi.org/10.1071/ch9891067.

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A series of 20 cationic vinylidene complexes of ruthenium and osmium [M(CCRR′)(L)(L′)(η- C5H5)]+ (R′ = Me, Ph, C6H4F-4, C6F5, (CH2)2C2H; R′ = Me, CH2Ph, CH2CH=CH2, CH2C2CH, (CH2hBr; L, L′=PPh3, CNBUT, dppm, dppe; not all combinations), [{Ru (CCRCH2-)(PPH3)2( η- C5H5)2]2+ and [CH2{ CPhCRu (PPh3)2(η-C5H5)]2]2+ have been obtained from reactions between the metal acetylide complexes and the appropriate organic halides.
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Arisawa, Mieko. « Transition-Metal-Catalyzed Synthesis of Organophosphorus Compounds Involving P–P Bond Cleavage ». Synthesis 52, no 19 (7 juillet 2020) : 2795–806. http://dx.doi.org/10.1055/s-0040-1707890.

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Organophosphorus compounds are used as drugs, pesticides, detergents, food additives, flame retardants, synthetic reagents, and catalysts, and their efficient synthesis is an important task in organic synthesis. To synthesize novel functional organophosphorus compounds, transition-metal-catalyzed methods have been developed, which were previously considered difficult because of the strong bonding that occurs between transition metals and phosphorus. Addition reactions of triphenylphosphine and sulfonic acids to unsaturated compounds in the presence of a rhodium or palladium catalyst lead to phosphonium salts, in direct contrast to the conventional synthesis involving substitution reactions of organohalogen compounds. Rhodium and palladium complexes catalyze the cleavage of P–P bonds in diphosphines and polyphosphines and can transfer organophosphorus groups to various organic compounds. Subsequent substitution and addition reactions proceed effectively, without using a base, to provide various novel organophosphorus compounds.1 Introduction2 Transition-Metal-Catalyzed Synthesis of Phosphonium Salts by Addition Reactions of Triphenylphosphine and Sulfonic Acids3 Rhodium-Catalyzed P–P Bond Cleavage and Exchange Reactions4 Transition-Metal-Catalyzed Substitution Reactions Using Diphosphines4.1 Reactions Involving Substitution of a Phosphorus Group by P–P Bond Cleavage4.2 Related Substitution Reactions of Organophosphorus Compounds4.3 Substitution Reactions of Acid Fluorides Involving P–P Bond Cleavage of Diphosphines5 Rhodium-Catalyzed P–P Bond Cleavage and Addition Reactions6 Rhodium-Catalyzed P–P Bond Cleavage and Insertion Reactions Using Polyphosphines7 Conclusions
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Yu, Xianghua, Laurel A. Morton et Zi-Ling Xue. « Transition-Metal Silyl Complexes and Chemistry in the Reactions of Silanes with Transition-Metal Complexes ». Organometallics 23, no 10 (mai 2004) : 2210–24. http://dx.doi.org/10.1021/om049862p.

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Bruce, Michael I., Christopher Dean, D. Neil Duffy, Mark G. Humphrey et George A. Koutsantonis. « Reactions of transition metal σ-acetylide complexes ». Journal of Organometallic Chemistry 295, no 3 (novembre 1985) : c40—c44. http://dx.doi.org/10.1016/0022-328x(85)80329-6.

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Shridharshini Kumar, Praveen Sekar et Senthil Kumar Raju. « Microwave assisted Schiff base metal complexes as potential anticancer and antimicrobial agents : A critical review ». Open Access Research Journal of Science and Technology 7, no 2 (30 mars 2023) : 001–18. http://dx.doi.org/10.53022/oarjst.2023.7.2.0016.

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Schiff bases are organic compounds which contain azomethine group (-C=N-) by reacting primary amines and carbonyl compounds. The presence of an azomethine group in the Schiff base facilitates coordination with transition metal ions. The term Schiff base is normally applied to these compounds when they are being used as ligands to form coordination complexes with metal ions. Such complexes occur naturally, but the majority of Schiff bases are artificial and are used to form many important catalysts. Schiff base metal complexes prepared using microwave irradiation have gained more attention because of their excellent strategy in generating quick and stable products in higher yields by improving the speed of reaction with lesser energy and exhibits various biological activities including antifungal, antibacterial, anti-tubercular, antiviral, antimalarial, anti-diabetic, anticancer, antioxidant, antidiuretic, anti-inflammatory, antipyretic and anti-HIV agents. Apart from biological applications, they are also used as a catalyst in Aldol reactions, polymerization reactions, oxidation reactions and other chemical reactions. Imine-ligand containing transition metal complexes including copper, zinc and cadmium, have proven to be effective starting points for the synthesis of metal or metal chalcogenide nanoparticles. In this review, various metal complexes derived from Schiff bases synthesised using microwave approaches are discussed along with their antibacterial, antifungal and anticancer activities.
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Thèses sur le sujet "Transition Metal Complexes - Organic Reactions"

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Sheridan, J. B. « The reactions of transition metal hydrocarbon complexes ». Thesis, University of Bristol, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356238.

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Cupertino, D. C. « Reactions of highly functionalised alkenes with some transition metal complexes ». Thesis, University of Liverpool, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370840.

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Thu, Hung-yat. « Catalytic C-H bond functionalization reactions catalyzed by rhodium(III) porphyrin, palladium(II) and platinum(II) acetate complexes ». View the Table of Contents & ; Abstract, 2006. http://sunzi.lib.hku.hk/hkuto/record/B38027872.

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Furze, John D. « A study of the substitution, carbonylation and free radical reactions of some transition metal complexes ». Thesis, Kingston University, 1989. http://eprints.kingston.ac.uk/20525/.

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Saleem, al-Shaqri Layla Mohammed. « Kinetic studies of inorganic and organic peroxo complexes / ». free to MU campus, to others for purchase, 2003. http://wwwlib.umi.com/cr/mo/fullcit?p3099628.

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Allen, D. L. « The reaction of carbon dioxide with tertiary-phosphine transition-metal complexes and related studies ». Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375231.

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Oshima, Kazuyuki. « Organic Synthesis Based on Transition-Metal-Catalyzed Addition Reactions of Boron Reagents ». 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/157539.

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Nuel, Didier. « Etude de la reactivite de fragments alkylidynes dans des clusters trinucleaires du fer ». Toulouse 3, 1986. http://www.theses.fr/1986TOU30206.

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Reactivite des complexes fe::(3)(co)::(9)(cch::(3))(coc::(2)h::(5)) ou fe::(3)(co)::(10)(cch::(3))(h). Les reactions de couplage des groupes alkylidynes avec les algues sont faciles. L'action de co a mis en evidence le couplage reversible dans des conditions douces de 2 fragments alkylidynes. En general, la presence du coordinat hydruro rend les reactions plus complexes
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Arliguie, Thérèse. « Complexes du ruthenium hydrures et derives de l'hydrogene moleculaire : reactions de deshydrogenation inter et intramoleculaires ». Toulouse 3, 1988. http://www.theses.fr/1988TOU30111.

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On etudie la reactivite chimique de complexes polyhudrures de ruthenium apres activation thermique ou photochimique. Certains complexes pentamethylcyclopentadienyl sont egalement prepares et etudies en spectroscopie rmn du proton
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Hartikka, Antti. « Towards Rational Design of Asymmetric Catalyst for Organometallic and Organocatalytic Reactions ». Doctoral thesis, Uppsala : University Library / Universitetsbiblioteket, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7905.

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Livres sur le sujet "Transition Metal Complexes - Organic Reactions"

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Bruce, King R., et Oliver J. P. 1934-, dir. Organometallic chemistry reviews : Annual surveys : transition metals in organic synthesis, organic reactions of selected [pi]-complexes. Amsterdam : Elsevier, 1987.

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Wilkins, Ralph G. Kinetics andmechanisms of reactions of transition metal complexes. 2e éd. Weinheim : VCH, 1991.

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Wilkins, Ralph G. Kinetics andmechanisms of reactions of transition metal complexes. 2e éd. Weinheim : VCH, 1991.

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Wilkins, Ralph G. Kinetics and mechanism of reactions of transition metal complexes. 2e éd. Weinheim : VCH, 1991.

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Wilkins, Ralph G. Kinetics and mechanism of reactions of transition metal complexes. 2e éd. Weinheim : VCH, 1991.

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Wilkins, Ralph G. Kinetics and mechanisms of reactions of transition metal complexes. 2e éd. Weinheim : VCH Publishers, 1991.

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Kündig, E. Peter, dir. Transition Metal Arene π-Complexes in Organic Synthesis and Catalysis. Berlin, Heidelberg : Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/b76615.

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Peter, Kündig E., et Böttcher A, dir. Transition metal arene [pi]-complexes in organic synthesis and catalysis. Berlin : Springer-Verlag, 2004.

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El-Naby, Sultan Ahmed Abd. A study of the reactions of nucleophiles with [(Indenyl)Fe(CO)2([eta]1-dppa)]BF4 a=m,e,p. Dublin : University College Dublin, 1997.

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Sellow, Khaled Ahmed F. Studies of the reactions of metal carbonyl complexes with phosphorus and nitrogen-containing ligands. Dublin : University College Dublin, 1998.

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Chapitres de livres sur le sujet "Transition Metal Complexes - Organic Reactions"

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Benyunes, Stephen A., Susan E. Gibson, Gary R. Jefferson, P. Caroline V. Potter, Mark A. Peplow, Ellian Rahimian, Mark H. Smith et Mark F. Ward. « Stereoselective Reactions of Transition Metal Carbonyl Complexes ». Dans Organic Synthesis via Organometallics OSM 5, 75–96. Berlin, Heidelberg : Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-49348-5_6.

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Twigg, M. V. « Homogeneous Catalysis of Organic Reactions by Transition Metal Complexes ». Dans Mechanisms of Inorganic and Organometallic Reactions, 365–433. Boston, MA : Springer US, 1989. http://dx.doi.org/10.1007/978-1-4613-0827-0_14.

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Twigg, M. V. « Homogeneous Catalysis of Organic Reactions by Transition Metal Complexes ». Dans Mechanisms of Inorganic and Organometallic Reactions, 363–96. Boston, MA : Springer US, 1994. http://dx.doi.org/10.1007/978-1-4899-1624-2_14.

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Twigg, M. V. « Homogeneous Catalysis of Organic Reactions by Transition Metal Complexes ». Dans Mechanisms of Inorganic and Organometallic Reactions Volume 7, 339–67. Boston, MA : Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3710-6_14.

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Willner, Itamar, et Noa Lapidot. « Photoinduced Electron-Transfer Reactions between Excited Transition Metal Complexes and Redox Sites in Enzymes ». Dans Photosensitive Metal—Organic Systems, 185–209. Washington, DC : American Chemical Society, 1993. http://dx.doi.org/10.1021/ba-1993-0238.ch010.

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Nédélec, Jean-Yves, Jacques Périchon et Michel Troupel. « Organic electroreductive coupling reactions using transition metal complexes as catalysts ». Dans Topics in Current Chemistry, 141–73. Berlin, Heidelberg : Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/3-540-61454-0_72.

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Schenk, W. A., N. Burzlaff et M. Hagel. « Enantioselective Organic Syntheses Using Chiral Transition Metal Complexes - The Search for Highly Dissymetric Templates ». Dans Selective Reactions of Metal-Activated Molecules, 241–43. Berlin, Heidelberg : Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-00975-8_35.

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Atwood, David A. « (II) Transition Metal Complexes ». Dans Inorganic Reactions and Methods, 176. Hoboken, NJ, USA : John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145296.ch169.

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Harrod, John F., et Bruce Arndtsen. « Transition Metal Hydride Complexes ». Dans Inorganic Reactions and Methods, 337–41. Hoboken, NJ, USA : John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145296.ch238.

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Nakatani, Naoki, Jia-Jia Zheng et Shigeyoshi Sakaki. « Approach of Electronic Structure Calculations to Crystal ». Dans The Materials Research Society Series, 209–55. Singapore : Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-0260-6_11.

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AbstractNowadays, the importance of molecular crystals and solids with regular structures is increasing in both basic chemistry and applied fields. However, theoretical studies of those systems based on electronic structure theories have been limited. Although density functional theory (DFT) calculations using generalized gradient approximation type functional under periodic boundary condition is effective for such theoretical studies, we need some improvements for calculating the dispersion interaction and the excited state of crystals. Accordingly, in this chapter, two methods for calculating the electronic structures of molecular crystals are discussed: cluster-model/periodic-model (CM/PM)-combined method and quantum mechanics/periodic-molecular mechanics (QM/periodic-MM) method. In the CM/PM-combined method, an infinite crystal system is calculated by the DFT method under periodic boundary condition, and important moieties, which are represented by CMs, are calculated by either DFT method with hybrid-type functionals or wave function theories such as the Møller–Plesset second-order perturbation theory (MP2), spin-component-scaled-MP2, and coupled-cluster singles and doubles theory with perturbative triples (CCSD(T)). This method is useful for gas adsorption into crystals such as metal–organic frameworks. In the QM/periodic-MM method, an important moiety is calculated using a QM method such as the DFT method with hybrid-type functionals and wave function theories, where the effects of the crystal are incorporated into the QM calculation via the periodic MM method using a classical force field. This method is useful for theoretical studies of excited states and chemical reactions. The applications of these methods in the following processes are described in this chapter: adsorption of gas molecules on metal–organic frameworks, chemical reactions in crystals, and luminescence of the crystals of transition metal complexes. To the best of our knowledge, the theoretical calculations conducted in this chapter show one of the successful approaches of electronic structure theories to molecular crystals, because of the reasonable and practical approximations.
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Actes de conférences sur le sujet "Transition Metal Complexes - Organic Reactions"

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Jeran, Marko, Melita Tramšek et Gašper Tavčar. « Chromyl Fluoride as a Strongman Representative of the Chromium (VI) Dioxodihalides Oxidizing Agent Family ». Dans Socratic Lectures 8. University of Lubljana Press, 2023. http://dx.doi.org/10.55295/psl.2023.i16.

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The chemistry of chromium (Cr) as a transition state element includes a variety of oxidation states and their specific colours. The general and most common oxidation states of chromium are (+6), (+3), and (+2). However, some stable compounds with (+5), (+4) and (+1) states are also known. The main species formed by chromium in the (+6) oxidation state are the chromate (CrO4 2- ) and dichromate (Cr2O7 2- ) ions. Chromium (VI) dioxodihalides represent a group of versatile oxidants that donate oxygen atoms to a variety of organic molecules. Chromium-oxotransition metal complexes in higher oxidation states have been used as models in biochemical studies, in particular to investigate how such systems can mimic biologically relevant mixed-function oxygenases and how the oxygen ligands interact in electrophilic reactions. The representative compound from this group of chromium compounds is chromyl fluoride (CrO2F2), which was mentioned after 1952, when its physical properties were precisely determined. It is a violetred coloured crystalline solid that melts to an orange-red liquid at a temperature close to room temperature. In this paper, two ways to prepare chromium fluoride are presented: (a) by reaction between its chloride analogues and gaseous fluorine and (b) by reaction between chromium(VI) oxide and anhydrous hydrogen fluoride. Raman spectroscopy was used to characterise the crude products directly in the FEP tube. Its physical properties and chemical reactivity pose a great challenge for synthesis. Special equipment is required for its production (e.g. a nickel vacuum line system). Keywords: Chromium; Chromium(VI) dioxodihalides; Chromyl fluoride (CrO2F2); Fluorine; Anhydrous hydrogen fluoride; Raman spectroscopy
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Zhuang, Shiqiang, Xuan Shi et Eon Soo Lee. « A Review on Non-PGM Cathode Catalysts for Polymer Electrolyte Membrane (PEM) Fuel Cell ». Dans ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology collocated with the ASME 2015 Power Conference, the ASME 2015 9th International Conference on Energy Sustainability, and the ASME 2015 Nuclear Forum. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/fuelcell2015-49602.

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In recent years, people attach high attention to the energy problem owing to the energy shortage of the world. Since the price of energy resources significantly increases, it is a necessary requirement to develop new alternative sources of energy to replace non-renewable energy resources. Polymer electrolyte membrane (PEM) fuel cell technology is one of the promising fields of clean and sustainable power, which is based on direct conversion of fuel into electricity. However, at the present moment PEM fuel cell is unable to be successful commercialization. The main factor is the high cost of materials in catalyst layer which is a core part of PEM fuel cell. In order to reduce the overall system cost, developing active, inexpensive non-platinum group metal (non-PGM) electrode catalysts to replace currently used Platinum (Pt)-based catalysts is a necessary and essential requirement. This paper reviews several important kinds of non-PGM electro-catalysts with different elements, such as nitrogen, transition metal, and metal organic frameworks (MOF). Among these catalysts, transition metal nitrogen-containing complexes supported on carbon materials (M-N/C) are considered the most potential oxidation reduction reaction (ORR) catalysts. The main synthetic methods are high temperature heat treating (800–1000°C). The mechanical and electrochemical properties of the final product will be analyzed by several characterization methods. For example, a RRDE test will be used to measure electron transfer number and ORR reactivity, which are the most important electrochemical properties of the new catalyst. And the morphology, particle size, crystal phase and specific surface area can be analyzed with SEM, TEM, XRD and BET methods. Although great improvement has been achieved in non-PGM catalyst area of research, there are still some challenges in both ORR activity and stability of non-PGM catalysts. Consequently, how to improve the ORR activity and stability are the major challenge of non-PGM catalyst research and development. Based on the results achieved in this area, our future research direction is also presented and discussed in this paper.
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Pietschnig, Rudolf, Carmen Moser, Stefan Spirk et Sven Schäfer. « Synthesis and Structure of Transition Metal Bisalkinylselenolato Complexes ». Dans The 9th International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland : MDPI, 2005. http://dx.doi.org/10.3390/ecsoc-9-01518.

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Turro, Claudia, et Rebkah A. Wroblewski. « Excited states of transition metal complexes for medical applications and solar energy conversion ». Dans Organic Photonic Materials and Devices XXIV, sous la direction de Ileana Rau, Okihiro Sugihara et William M. Shensky. SPIE, 2022. http://dx.doi.org/10.1117/12.2613362.

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Huszár, Bianka, Zoltán Mucsi et György Keglevich. « Transition Metal-Catalyzed, “Ligand Free” P–C Coupling Reactions under MW Conditions ». Dans International Electronic Conference on Synthetic Organic Chemistry. Basel Switzerland : MDPI, 2022. http://dx.doi.org/10.3390/ecsoc-26-13647.

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Al-Amiery, Ahmed, Mahdi Radi et Redha AL-Bayati. « Synthesis, spectroscopic and antimicrobial studies of transition metal complexes of N-amino quinolone derivatives ». Dans The 14th International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland : MDPI, 2010. http://dx.doi.org/10.3390/ecsoc-14-00435.

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Musa, Taghreed, Mahmoud Al-Jibouri et Bayader Abass. « Synthesis, Characterization and Thermal Study of New Transition MEtal Complexes Derived from 3-Acetylcoumarine ». Dans The 20th International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland : MDPI, 2016. http://dx.doi.org/10.3390/ecsoc-20-b015.

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Stoutland, Page O., Stephen K. Doom, R. Brian Dyer et William H. Woodruff. « Ultrafast Vibrational Energy Relaxation in [(NC)5MIICNMIII(NH3)5]1-(M = Ru, Os) Studied by Picosecond Infrared Spectroscopy ». Dans International Conference on Ultrafast Phenomena. Washington, D.C. : Optica Publishing Group, 1994. http://dx.doi.org/10.1364/up.1994.thd.13.

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Mixed-valence transition metal complexes have long been used to study electron transfer reactions due to the availability of well-defined complexes with favorable spectroscopic properties.1 These studies have resulted in a plethora of information concerning the fundamental aspects of electron transfer reactions. We have recently used complexes of this type to investigate ultrafast electron transfer and vibrational energy relaxation dynamics in cyanide-bridged mixed-valence transition metal dimers. These studies have allowed us to observe, for the first time in the solution phase, the vibrational excitation which accompanies electron transfer reactions. In previous publications2 we have shown that (1) optical excitation into the metal to metal charge transfer (MMCT) transition of a series of mixed-valence transition metal complexes leads to formation of the excited state redox isomer, and that (2) subsequent ultrafast back electron transfer regenerates the original species, with much of the electronic excitation energy being converted into vibrational energy in the product. To date we have discussed the electron transfer and the coupled vibrational excitation. Here, we concentrate on the relaxation of the vibrationally excited molecules produced following the back electron transfer.
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Greve, Daniel R., Tommy Geisler, Thomas Bjørnholm et Jan C. Petersen. « Third-Order Nonlinear Optical Effects in Organic Nickel Complexes and Triarylmethyl Cations ». Dans Organic Thin Films for Photonic Applications. Washington, D.C. : Optica Publishing Group, 1995. http://dx.doi.org/10.1364/otfa.1995.md.23.

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The second molecular hyperpolarizability, γ, has been determined at 1064 nm by Third- Harmonic Generation (THG) using the Maker fringe technique, for a family of triarylmethyl cations and for a familiy of organic Nickel complexes as guests in PMMA thin films. For the metal complexes it is a well established notion that the low-lying transition with ligand to metal charge transfer character is important for the nonlinear optical properties(1). However, ambiguity arises due to large discrepancies between different measurements(2-5), as well as difficulties in assessing the exact contribution to γ of the ligand to metal charge transfer transition(2,6). To assess the latter question by experimental means, we present here a comparison between a family of Nickel complexes, and triarylmethyl cations. The electronic structure of the triarylmethyl cations resemble that of the metal complexes in the sense that intramolecular charge transfer from the periphery to the central atom takes place upon excitation in the first electronic band. This is shown by semi-empirical PM3 calculations on the three members of the family shown in figure 1. For the amino substituted compound 1 the calculations reveal a significant charge transfer from the amino moiety to the central carbon atom. For the molecules 2 and 3 this effect decreases due to the less efficient donor substituents (2) or forced planarity (3) resulting in more delocalized electronic states both in the HOMO and the LUMO. The observed γ values (table 1) can be correlated with the PM3 calculations in the way that the greater the amount of charge moved and the longer the spatial distance over wich it is moved, the greater is γ. The calculated static γ values, using the semi-empirical PM3/Finite-Field method follow the same trend although much smaller values are obtained.
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Jovanović-Stević, Snežana, Jovana Bogojeski, A. Caković et B. Petrović. « NUCLEOPHILIC SUBSTITUTION REACTIONS OF THE CAFFEINE- DERIVED PT(II) AND PD(II) COMPLEXES WITH IMPORTANT BIOMOLECULES ». Dans 1st INTERNATIONAL Conference on Chemo and BioInformatics. Institute for Information Technologies, University of Kragujevac, 2021. http://dx.doi.org/10.46793/iccbi21.383js.

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The application of transition metal complexes as chemotherapeutics has been presented throughout the history. Platinum-based drugs are widely used as anticancer agents with a broad range of antitumor activities. The study of the substitution reactions of metal complexes with nitrogen containing biomolecules can help to develop new antitumor drugs with improved characteristics. Kinetics of the substitution reactions of [Pt(caffeine)2Cl2] and [Pd(caffeine)2Cl2] (caffeine = 1,3,7-trimethylxanthine) complexes with biologically important ligands such as 9-methylguanine (9-MetGua) and guanosine-5’-monophosphate (5’-GMP) were studied by UV-Vis spectrophotometry and by stopped-flow technique. Kinetics measurements were performed under the pseudo-first order conditions at 37 °C and pH = 7.2 (25 mM Hepes buffer) in addition of 50 mM NaCl. The obtained results showed that all substitution reactions undergo the two reaction steps giving the [M(caffeine)2(Nu)2] (M = Pd(II) or Pt(II) and Nu = 5′-GMP or 9-MetGua) as the reaction product. Additionally, [Pd(caffeine)2Cl2] complex was more reactive compared to analogue platinum-complex, while 9-MetGua reacted faster than 5’-GMP.
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Rapports d'organisations sur le sujet "Transition Metal Complexes - Organic Reactions"

1

Schmehl, Russell H. Energy, Electron Transfer and Photocatalytic Reactions of Visible Light Absorbing Transition Metal Complexes. Office of Scientific and Technical Information (OSTI), mars 2016. http://dx.doi.org/10.2172/1240023.

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2

Isied, Stephan S. Transition Metal Donor-Peptide-Acceptor Complexes : From Intramolecular Electron Transfer Reactions to the Study of Reactive Intermediates. Office of Scientific and Technical Information (OSTI), mars 2003. http://dx.doi.org/10.2172/899301.

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