Dissertations / Theses on the topic 'Samarium compounds'
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Powell, Jonathon Raymond. "Samarium diiodide mediated radical cyclisations of a B-unsaturated carbonyl compounds." Thesis, University of Southampton, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494762.
Full textEssman, Stephanie Christine. "Effects of ¹⁵³samarium-ethylenediaminetetramethylene phosphonate on physeal and articular cartilage in juvenile rabbits /." Free to MU Campus, others may purchase, 2003. http://wwwlib.umi.com/cr/mo/fullcit?p1418016.
Full textGASIGLIA, HAROLDO T. "Estudos sobre a formacao do complexo do sup(153)Sm com EDTMP (acido etilenodiaminotetrametileno-fosfonico) e dos complexos do sup(153)Sm com outros fosfonatos, em temperatura ambiente." reponame:Repositório Institucional do IPEN, 2000. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10887.
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Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
McKerlie, Fiona. "Reduction of α-aryloxy carbonyl compounds with samarium (II) iodide : a novel traceless linker for the solid phase synthesis of carbonyl compounds." Thesis, University of Glasgow, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269503.
Full textHibino, Takashi, Atsuko Tomita, Mitsuru Sano, Masahiro Nagao, Kohsuke Okamoto, Takanori Kawai, and Masaya Yano. "Single-Chamber SOFCs Using Dimethyl Ether and Ethanol." The Electrochemical Society, 2007. http://hdl.handle.net/2237/18431.
Full textWang, Dongqi, and 王東琪. "Density functional theory studies of selected zinc, lithium, and samarium carbenoid species and their cyclopropanation reactions witholefins." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B29486889.
Full textSano, Mitsuru, Masahiro Nagao, Takashi Hibino, Atsuko Tomita, and Daisuke Hirabayashi. "Design of a Reduction-Resistant Ce0.8Sm0.2 O 1.9 Electrolyte Through Growth of a Thin BaCe1−xSmxO3−α Layer over Electrolyte Surface." The Electrochemical Society, 2004. http://hdl.handle.net/2237/18454.
Full textBONTURIM, EVERTON. "Estudo das propriedades do óxido BSCF para aplicação com cátodo em células a combustível de óxido sólido de temperatura intermediária (ITSOFC)." reponame:Repositório Institucional do IPEN, 2012. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10141.
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Dissertação (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
Kan, Tze-wai Jovi, and 簡紫慧. "Development of new polymer-supported reagents for organic synthesis, solvent effects in samarium promoted allylic alcohol cyclopropanationreactions and time resolved resonance studies of the photodeprotectionof p-hydroxyphenacyl caged phototrigger compounds." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B37925660.
Full textKan, Tze-wai Jovi. "Development of new polymer-supported reagents for organic synthesis, solvent effects in samarium promoted allylic alcohol cyclopropanation reactions and time resolved resonance studies of the photodeprotection of p-hydroxyphenacyl caged phototrigger compounds." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B37925660.
Full textROCHA, SORAYA M. R. da. "Síntese e caracterização de precursores para catalisadores termicamente estáveis à base de lantanideos pelo método sol-gel." reponame:Repositório Institucional do IPEN, 2005. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11271.
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Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
Wang, Yifeng, Kyu Hyoung Lee, Hiromichi Ohta, and Kunihito Koumoto. "Thermoelectric properties of electron doped SrO(SrTiO3)n (n=1,2) ceramics." American Institite of Physics, 2009. http://hdl.handle.net/2237/12629.
Full textKsari-Habiles, Younal. "Magnétisme dans les fullerènes : contribution à l'étude de nouvelles phases magnétiques dérivées de l'intercalation des métaux de terres rares dans le réseau du C60." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10120.
Full textBoujida, Mohamed. "Contribution à l'étude des propriétés de transport de quelques oxydes métalliques et supraconducteurs de basse dimensionnalité." Grenoble 1, 1988. http://www.theses.fr/1988GRE10157.
Full textNaini, Ahmed. "Synthèse de cyclopendants aminophosphorés : complexes d'ions paramagnétiques et de radionucléides à finalité biomédicale." Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10174.
Full textMAROLLEAU-MARTINEAU, ISABELLE. "Proprietes redox et thermodynamiques de complexes macrocycliques de lanthanides (sm, eu, yb) et effets de solvants (dmf et ch : :(3)cn)." Université Louis Pasteur (Strasbourg) (1971-2008), 1989. http://www.theses.fr/1989STR13040.
Full textGrové, Jacobus Johannes Cronjé. "Samarium(II) iodide mediated conversion of carbohydrates into carbocycles." Thesis, 2012. http://hdl.handle.net/10210/7455.
Full textThe topic of this thesis centres around the construction of carbocycles from carbohydrates involving the use of SmI2 as reagent. Carbocycles, in particular functionalised cyclopentanes, form important substructures in a plethora of natural compounds, many of which are biologically active. The conversion of carbohydrates into stereodefined cyclopentanoids represents an attractive means of generating this type of compounds. The SmI2-mediated cyclisation of hex-5-enals, derived from suitably substituted carbohydrate precursors via a zinc-mediated Grob-fragmentation reaction, was found to be a facile reaction generating stereodefined cyclopentanols in moderate yields. The effect of varying stereochemistry and substitution pattern on the outcome of the cyclisation was also investigated. In order to achieve a more efficient route to the cyclic products, a Grobfragmentation based on SmI2 was investigated. The substituent at the anomeric position of the carbohydrate was found to be crucial to the success of the fragmentation. This protocol gave rise to conditions under which fragmentation and cyclisation could be effected in a tandem fashion mediated by SmI2. Various attempts at intermolecular trapping of the organosamarium species generated after cyclisation proved fruitless. In order to circumvent these obstacles a tandem radical bicyclisation reaction was investigated for the construction of highly functionalised bicyclic ring systems. This approach proved to be a successful alternative for incorporating functionality at the exocyclic carbon atom which is otherwise difficult to achieve. The second part of this work is directed at the synthesis of stereodefined alkoxyaminocyclopentanes from carbohydrates promoted by SmI2. The intramolecular trapping of a radical by an oxime ether represents an attractive means of generating these compounds. The preparation of the iodo oxime ether starting materials from suitably substituted carbohydrates is discussed. The radical cyclisation under the action of SmI2 was found to be a facile process providing a rapid route to aminocyclopentanes which are used as key intermediates for the preparation of carbocyclic glycosidase inhibitors and analogues. In the third part of this work, the construction of functionalised cyclobutanols from carbohydrate precursors is discussed. The 4-exo-trig cyclisation holds promise as a general route for the stereoselective synthesis of highly functionalised cyclobutanols. Initial attempts at the 4-exo-trig cyclisation proved fruitless. It was subsequently established that the radical acceptor plays a crucial role in the success of the transformation. This led to the isolation of the first carbohydrate derived cyclobutanol. The final part of this thesis involves the development of a new approach for the conversion of suitably functionalised pentose derivatives into chiral cyclopentanols. Cyclisation of a ribose derived hemiacetal via its in situ formed hex-5-ynal is discussed. This approach opens new possibilities for the construction of complex carbocycles from readily available carbohydrate starting materials.
Kuo, Chih-Wei, and 郭志維. "Intramolecular Cyclization of Aromatic Carbonyl Compounds Promoted by Samarium Diiodide." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/81996071251773030008.
Full text國立臺灣大學
化學系
86
Samarium (II) iodide is a useful one-electron-transfer reducing agent. In the solution of SmI2/THF, aromatic aldehydes or aromatic ketones readily undergo self-coupling reactions to give pinacols. If the reactions are performed in the presence of HMPA, the products derived from the phenyl-carbonyl couplings are obtained. In this thesis I describe the use of HMPA as a cosolvent to promote the intramolecular phenyl-carbonyl coupling reactions of aromatic carbonyls in SmI2/THF solution. The starting materials, including benzaldehydes, acetophenones and benzoates having different tethers (R1 = H, Me, OMe; R2 = H, Me; X = O, CH2; n = 1, 2, 3) are prepared by simple method and their coupling reactions are investigated. These intramolecular coupling reactions are utilized to construct five-, six- or seven membered rings fused with the benzene rings.
Blann, Kevin. "Samarium(II) iodide induced reactions: a case of make or break." Thesis, 2008. http://hdl.handle.net/10210/337.
Full textProf. D.B.G. Williams
Yang, Fwu-Duo, and 楊福多. "Samarium(II) iodide-promated Hydroxyalkylations of indole-3- Carbonyls. A Route to Indole-fused cyclic compounds." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/99441102573625192027.
Full text國立臺灣大學
化學學系
82
Our main work is to study the use of HMPA as a cosolvent to promote the hydroxyalkylation of indole-3-carbonyls by SmI in THF solution.intermolecular hydroxyalkylation reactions of ind- ole-3-carbonyls with aromatic aldehydes or aliphatic aldehydes were achieved. The products were readily converted to furo[3,4- b]indole, Pyrr- olo[3,4-b]indole and thieno[3,4-b]indole, which are the equiva- lents of the indole-2,3-quinodimethanes. The hydroalkylation products were easily oxidized to the 2,3-dicarbonylindoles. The dicarbonylindoles reacted with hydrazine to give the pyridazino [4,5-b]indoles, which are potentially used as antihypertensive agent.
Caldwell, Tod Moulton William G. "Nuclear magnetic resonance studies of field effects on single crystal SmB6." 2004. http://etd.lib.fsu.edu/theses/available/etd-03252004-143748.
Full textAdvisor: Dr. William G. Moulton, Florida State University, College of Arts and Sciences, Dept. of Physics. Title and description from dissertation home page (viewed June 15, 2004). Includes bibliographical references.
"Using sterically hindered anionic N-donor ligands for stabilization of low-valent metal complexes." 2015. http://repository.lib.cuhk.edu.hk/en/item/cuhk-1290686.
Full textChapter 1 presents an overview on divalent lanthanide complexes derived from nitrogen-coordinating ligands. The coordination chemistry of low valent and low-coordinate first-row transition metal complexes was also reviewed.
Chapter 2 describes the preparation and characterization of samarium(II) triazenide complex [Sm(L¹)₂(THF)₂] (2). Complex 2 was prepared by the reaction of SmI₂(THF)₂ with 2 equivalents of potassium triazenide [KL¹(THF)₀.₅] (1). The electrochemistry of 2 in THF was studied with cyclic voltammetry. Complex 2 is a strong reducing reagent. Its reactions with various inorganic/organic substrates have been examined. Treatment of 2 with AgCl or PhCH₂Cl gave Sm(III) bis(triazenide) chloride complex [Sm(L¹)₂Cl(THF)₂] (3), whilst reaction of 2 with I₂ led to the isolation of the iodide complex [Sm(L¹)I₂(THF)₃] (4). Reactions of 2 with PhEEPh (E = S, Se) afforded the corresponding Sm(III) chalcogenolate complexes [Sm(L¹)₂(EPh)(THF)] (E = S (5), Se (6)). On the other hands, addition of 2 to ArEEAr (Ar = Buᵗ₂C₆H₃−2,6, E = S, Se and Te) yielded the homoleptic Sm(III) tris(triazenide) complex [Sm(L¹)₃] (7) as the only isolable product. Besides, reactions of 2 with O₂, S₈, Se, Ph₃P=Se and BuᵗOOBuᵗ also yielded complex 7. Complex 2 reacted with PhNHNH₂ and PhNHNHPh, leading to the isolation of the corresponding Sm(III) phenylhydrazido complexes [Sm(L¹)₂(DMAP)₂(NH₂NPh)] (8) and [Sm(L¹)(THF)(μ-η²:η²-PhNNPh)]₂ (9). Reactions of 2 with azobenzene, benzophenone, 9-fluorenone, adamantyl azide, N, N’-dicyclohexylcarbodiimide, N, N’-diisopropylcarbodiimide, and CS₂ were examined as well.
Chapter 3 reports on the coordination chemistry of the triazenide ligand L¹ with divalent ytterbium and europium ions. Metathetical reaction of LnI₂(THF)₂ (Ln = Yb, Eu) with two molar equivalents of [Na(L¹)(THF)₃] (10) led to the corresponding divalent lanthanide(II) bis(triazenide) complexes [Eu(L¹)₂(THF)₂] (11) and [Yb(L¹)₂(THF)₂] (12). The heteroleptic ytterbium(II) complex [Yb(L¹)(μ-I)(THF)₂]₂.(C₆H₁₄) (13.C₆H₁₄) was also isolated along with 12. Oxidation of 12 with CuCl afforded Yb(III) triazenide−chloride complex [Yb(L¹)₂Cl(THF)₂] (14). Treatment of 12 with PhEEPh (E = S, Se) afforded the corresponding Yb(III) chalcogenolate complexes [Yb(L¹)₂(EPh)(THF)] (E = S (15), Se (16)). Nevertheless, reactions of 12 with elemental sulfur and selenium yielded the homoleptic Yb(III) complex [Yb(L¹)₃] (17) as the only isolable product.
Chapter 4 deals with the synthesis and characterization of low valent and low-coordinate first row transition metal complexes derived from arylamido ligands L²-L⁵. Reaction of MCl₂ (M = Fe, Co) with one molar equivalent of lithium amide [Li(L³)(TMEDA)] (TMEDA = Me₂NCH₂CH₂NMe₂) yielded the corresponding monoamido complexes [M(L³)Cl(TMEDA)] (M = Fe (20) and Co (22)). Reduction of [Co(L²)Cl(TMEDA)] (21), 22 and [Co(L³)Cl(TMEDA)] (23) with potassium metal gave the corresponding cobalt(I) amido complexes [CoL²]₂ (24), [CoL₃]₂ (25) and [CoL⁴]₂ (26), respectively. Meanwhile, treatment of [Fe(L⁴)Cl(TMEDA)] (23) with potassium metal yielded iron(I)-dinitrogen complex [{FeL⁴(TMEDA)}₂(μ-η¹:η¹-N₂)] (27). Complexes 24-27 were fully characterized by X-ray crystallography, various spectroscopic techniques and cyclic voltammetry. DFT calculations were carried out in order to understand the electronic structures of these complexes.
Chapter 5 describes the preparation and characterization of three neutral two-coordinate first row transition metal complexes of the general formula [M(L⁵)₂] (M = Fe (29), Co (30), Ni (31)). They were prepared by the reactions of anhydrous MCl₂ (M = Fe, Co) or NiBr₂(DME) with [LiL⁵(Et₂O)₂] (28). The solid-state structures of complexes 29-31 were determined by X-ray diffraction analysis. They were also characterized by spectroscopic methods (UV/Vis, I.R.) and electrochemistry. TD-DFT computational analysis was carried out in order to assign UV/Vis spectra features of these two-coordinate late transition metal (Fe->Ni) complexes.
Chapter 6 reports on the coordination chemistry of L¹, L⁴ and L⁵ with chromium ions. Treatment of CrCl₂ or CrCl₃ with one molar equivalent of [Li(L¹)(Et₂O)₂] (32) yielded heteroleptic Cr(II) complex [Cr(L¹)(μ-Cl)(THF)]₂ (33) and Cr(III) complex [Cr(L¹)Cl₂(THF)₂] (34), respectively. Attempts to reduce 33 and 34 with potassium metal, potassium graphite or magnesium were unsuccessful, yielding [Cr(L¹)₂] (35). Reaction chemistry of 35 was also studied in our research work. No reaction was observed in the reaction of 35 with PhEEPh (E = S, Se). Treatment of 35 with iodine led to the isolation of iodide bridged heteroleptic Cr(II) complex [Cr(L¹)(μ-I)(THF)]₂ (36). Simple monodentate amido ligands L⁴ and L⁵ were also used to prepare Cr(I) complexes. Treatment of anhydrous CrCl₂ with [LiL⁴(Et₂O)₀.₅] and [LiL⁵(Et₂O)₂] (28) afforded oxidative deprotonation products [Cr{N(C₆H₃Prⁱ₂-2,6)(SiMe₂CH₂)}₂Cr(L⁴)] (37) and [Cr(L⁵){N(C₆H₃Prⁱ₂-2,6)(SiBuᵗMeCH₂)}] (38). Attempts to synthesize monovalent chromium complexes supported by the L¹, L⁴ and L⁵ ligands were still in progress during the submission of this thesis.
Chapter 7 summarizes the results of the present studies. A brief description on the future direction of this research work is also presented.
本項研究工作主要針對兩類負一价含氮配体,即雙齒叠氮基配体[(DippN)N(NDipp)]⁻ (Dipp = Prⁱ₂C₆H₃−2,6) (L¹)和單齒苯胺基配体[N(R)(Ar)]⁻ (R = SiMe₃, Ar = C₆H₃Me₂-2,6 (L²), C₆H₂Me₃-2,4,6 (L³) or C₆H₃Prⁱ₂-2,6 (L⁴); R = SiBuᵗMe₂, Ar = C₆H₃Prⁱ₂-2,6 (L⁵))的配位化學進行研究。本研究工作的第一部分致力於研究二價鑭系叠氮基配合物的合成,結構及其化學反應性。第二部分研究工作主要集中于由苯胺基構築的低價態,低配位數的第一周期后過渡金属的配位化學研究。最後一部分工作闡述了二價鉻叠氮基配合物和苯胺基配合物的合成,結構和表徵。
第一章概述了二價鑭系含氮配合物的發展。同時,也簡要闡述低價態,低配位數過鍍金属含氮配合物的研究工作。
第二章描述了二價釤叠氮基配合物[Sm(L¹)₂(THF)₂] (2)的製備,結構及其化學反應性。配合物2是由SmI₂(THF)₂與兩當量的鉀叠氮基化合物[KL¹(THF)₀.₅] (1) 反應製得。配合物2的電化學性質採用了循環伏安法進行了研究。介於配合物2為強還原劑,它與一系列無機/有機化合物的反應也予以探索。配合物2與AgCl或PhCH₂Cl反應得到了三價釤雙叠氮基氯化物[Sm(L¹)₂Cl(THF)₂](3),同時配合物2與單質碘I₂反應得到了碘化物[Sm(L¹)I₂(THF)₃] (4)。配合物2與二苯基硫族化合物PhSSPh及PhSeSePh反應得到了相應的三價釤硫族配合物[Sm(L¹)₂(EPh)(THF)](E = S (5), Se (6))。與之相反,配合物2與位阻較大的二苯基硫族化合物ArEEAr (Ar = Buᵗ₂C₆H₃−2,6, E = S, Se和Te)反應得到了均配的三價釤三叠氮基配合物[Sm(L¹)₃] (7)。此外,配合物2與O₂, S₈, Se, Ph₃P=Se和BuᵗOOBuᵗ反應都生成了配合物7。配合物2與苯肼化合物PhNHNH₂和PhNHNHPh反應得到了相應的三價釤苯肼配合物[Sm(L¹)₂(DMAP)₂(NH₂NPh)] (8) (DMAP = 對二甲基胺吡啶)以及[Sm(L¹)(THF)(μ-η²:η²-PhNNPh)]₂(9)。另外,本章對配合物2與偶氮苯;二苯基酮;9-芴酮;金剛烷叠氮化物;二環已基碳二亞胺;二異丙基碳二亞胺以及二硫化碳的反應性也進行了研究。
第三章講述了對該叠氮基配体L¹所衍生出的二價鐿和銪配合物的配位化學研究工作。二價鑭系碘化物LnI₂(THF)₂(Ln = Yb, Eu)與兩當量的鈉叠氮基化合物[Na(L¹)(THF)₃] (10)的複分解反應得到相應的二價鑭系雙叠氮基配合物[Eu(L¹)₂(THF)₂] (11)以及[Yb(L¹)₂(THF)₂] (12)。在製備二價鐿雙叠氮基配合物[Yb(L¹)₂(THF)₂] (12)的過程中同時得到了異配的二價鐿碘橋連單叠氮基配合物[Yb(L¹)(μ-I)(THF)₂]₂.(C₆H₁₄) (13.C₆H₁₄)。配合物12與CuCl的氧化反應得到三價鐿叠氮基氯化物[Yb(L¹)₂Cl(THF)₂] (14)。此外,配合物12與二苯基硫族化合物PhSSPh及PhSeSePh反應得到了相應的三價鐿硫族配合物[Yb(L¹)₂(EPh)(THF)] (E = S (15), Se (16))。然而,配合物12與單質硫和單質硒的反應生成唯一的產物,即均配的三價鐿三叠氮基配合物[Yb(L¹)₃] (17)。
第四章闡述了由苯胺基配体L²-L⁵所衍生的低價態,低配位數第一周期后過渡金屬的製備以及結構表徵。通過金屬氯化物MCl₂(M = Fe, Co)和一當量的鋰苯胺基化合物反應得到相應的二價鐡和鈷的單苯胺基配合物[M(L³)Cl(TMEDA)] (M = Fe (20) 和 Co (22))。配合物[Co(L²)Cl(TMEDA)] (21), 22和[Co(L³)Cl(TMEDA)] (23) 與金屬鉀的還原反應分別得到相應的一價鈷苯胺基配合物[CoL²]₂ (24), [CoL³]₂ (25) 和 [CoL⁴]₂ (26)。與此同時,二價鐡單苯胺基配合物[Fe(L⁴)Cl(TMEDA)] (23)與金屬鉀反應得到了一價鐡-偶氮配合物[{FeL⁴(TMEDA)}₂(μ-η¹:η¹-N₂)] (27)。配合物24-27的分子結構及其物理性質分別以X射綫衍射晶体學,波譜學以及循環伏安法表徵。密度泛函(DFT)這一理論計算方法也被用來瞭解這些配合物的電子結構。
第五章描述了三個二配位的第一周期后過渡金屬配合物[M(L⁵)₂] (M = Fe (29), Co (30), Ni (31))的製備和表徵。它們由相應的無水金屬鹵化物MCl₂ (M = Fe, Co)或NiBr₂(DME)與[LiL⁵(Et₂O)₂] (28)反應製得。配合物29-31的固體結構由X射綫衍射分析獲得。它們的光學性質和電學性質也分別由波譜方法(紫外可見光光譜,紅外光譜)以及循環伏安法表徵得到。含時密度泛函(TD-DFT)這一計算分析方法也被用來瞭解這些化合物紫外可見光光譜性質。此外,配合物31在有機烯烴與苯硅烷PhSiH3的硅氫化反應中被證實為有效的催化劑。
第六章講述了由配体L¹, L⁴與L⁵所構築的二價鉻的配位化學的研究。通過無水二氯化鉻CrCl₂或三氯化鉻CrCl₃與一當量的鋰叠氮基配合物[Li(L¹)(Et₂O)₂] (32)反應分別成功製備了相應的異配的二價鉻配合物[Cr(L¹)(μ-Cl)(THF)]₂ (33) 以及三价鉻配合物[Cr(L¹)Cl₂(THF)₂] (34)。利用金屬鉀,鉀碳以及單質鎂來還原配合物33和34生成了二價鉻雙叠氮基配合物[Cr(L¹)₂] (35)。此外,配合物35的反應性能也在本項工作得以研究。然而,在配合物35與二苯基硫族化合物PhSSPh及PhSeSePh反應中並沒有觀察到明顯的反應變化,依舊得到了原料配合物35。配合物35與單質碘I₂反應得到了異配碘橋連二價鉻配合物[Cr(L¹)(μ-I)(THF)]₂ (36)。單齒苯胺基配体L⁴和L⁵也被嘗試用來合成一價鉻配合物。無水二氯化鉻CrCl2與鋰苯胺基化合物[LiL⁴(Et₂O)₀.₅]和[LiL⁵(Et₂O)₂] (28)反應分別生成了氧化脫質子產物[Cr{N(C₆H₃Prⁱ₂-2,6)(SiMe₂CH₂)}₂Cr(L⁴)] (37) and [Cr(L⁵){N(C₆H₃Prⁱ₂-2,6)(SiBuᵗMeCH₂)}] (38)。關於利用叠氮基配体L¹,以及苯胺基配体L⁴和L⁵來製備一價鉻配合物的相關工作在遞交本論文的過程中还在進行中。
第七章總結了本論文的研究成果,並對本項工作未來的發展作出了簡要的描述。
Yun, Lei.
Thesis (Ph.D.)--Chinese University of Hong Kong, 2015.
Includes bibliographical references.
Abstracts also in Chinese.80-30|aDetailed summary in vernacular field only.
Title from PDF title page (viewed on 21, December, 2016).
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
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Detailed summary in vernacular field only.
Pei-Ru, Wang, and 王佩如. "I. Three-Component Coupling Reactions of Methyl Thiophenecarboxylate with Benzyl phenones : Establishment of Sulfur-containing Polyaromatic Fluorescent Compounds. II. An Attempt of Samarium Dienolate Generation and Its Electrophilic Reactions." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/31460709796907519151.
Full text國立臺灣大學
化學研究所
87
This thesis consists of two parts: (I) SmI-2/HMPA promoted coupling reactions of thiophene carbonyls, and (II) electrophilic reactions of samarium dienolates. By promotion of SmI2/HMPA, methyl thiophene-2-carboxylate with two equivalents of benzyl phenones underwent the reductive double electrophilic reactions in high stereoselective manners. The coupling products were successfully converted to a series of methyl tetraphenylbenzo[b]thiophene-2-carboxylates via acid-catalyzed dehydration and sequential oxidation-electrocyclization-oxidation on treated with DDQ. Their UV and fluorescence spectra were also measured. The self- and cross- coupling reaction occurred at 2-positon of thiophene-3-carbaldehyde, and the subsequent alkylation with benzyl bromide or allyl bromide at the sulfur atom. By the promotion of SmI3, the samarium dienolate was generated from 1-benzyl-2-butenone and underwent electrophilic addition with aldehydes to give chalcones. Possible reaction mechanisms are discussed.