Dissertationen zum Thema „Ditopic ligand“
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ALBISETTI, A. FIGINI. „Structural and Thermodiffractometric Studies of Coordination Polymers Containing Ditopic Exobidentate Nitrogen Ligand“. Doctoral thesis, Università degli Studi di Milano, 2008. http://hdl.handle.net/2434/57743.
Der volle Inhalt der QuelleRahm, Fredrik. „Chiral Pyridine-Containing Ligands for Asymmetric Catalysis. Synthesis and Applications“. Doctoral thesis, KTH, Chemistry, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3564.
Der volle Inhalt der QuelleThis thesis deals with the design and syntheses of chiral,enantiopure pyridinecontaining ligands and their applicationsin asymmetric catalyis.
Chiral pyridyl pyrrolidine ligands and pyridyl oxazolineligands were synthesized and employed in thepalladium-catalysed allylic alkylation of 1,3-diphenyl-2-propenyl acetate with dimethyl malonate. Theinfluence of the steric properties of the ligands wereinvestigated.
Ditopic ligands, containing crown ether units as structuralelements, were synthesized and some of the ligands were used asligands in the palladiumcatalysed allylic alkylation of1,3-diphenyl-2-propenyl acetate with dimethyl malonate. A smallrate enhancement was observed, compared with analogous ligandslacking the crown ether unit, when these ditopic ligands wereused in dilute systems.
A modular approach was used to synthesize chiralenantiomerically pure pyridyl alcohols and C2-symmetric2,2-bipyridines, with the chirality originating from thechiral pool. Electronic and steric properties of the compoundswere varied and they were used as ligands in theenantioselective addition of diethylzinc to benzaldehyde. Thesense of asymmetric induction was found to be determined by theabsolute configuration of the carbinol carbon atom. Theelectronic properties of the ligands had a minor influence onthe levels of enantioselectivity induced by the ligands.
Chiral pyridyl phosphinite ligands and pyridyl phosphiteligands were synthesized from the pyridyl alcohols andevaluated as ligands in palladiumcatalysed allylic alkylations.With the phosphinite ligands, the sense of chiral induction wasfound to be determined by the absolute configuration of theformer carbinol carbon atom. A kinetic resolution of theracemic starting material was observed with one of thephosphite ligands. Moderate enantioselectivities wereachieved.
Kewords:asymmetric catalysis, chiral ligand, chiralpool, oxazoline, crownether, ditopic receptor, bipyridine,pyridyl alcohol, modular approach, P,Nligand, diethylzinc,allylic alkylation.
Turner, Thomas P. W. „Bifunctional unsymmetrical ditopic ligands for alkene methoxycarbonylation“. Thesis, University of Bristol, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.658207.
Der volle Inhalt der QuelleSmith, Kate Jennifer. „Ditopic ligands for the extraction of divalent metal salts“. Thesis, University of Edinburgh, 2004. http://hdl.handle.net/1842/12982.
Der volle Inhalt der QuelleDussart, Caitlyn. „Chiral self-recognition study of metallic complexes : towards coordination polymers“. Electronic Thesis or Diss., Strasbourg, 2024. http://www.theses.fr/2024STRAE006.
Der volle Inhalt der QuelleMetallo-supramolecular polymeric assemblies are a new class of materials that have emerged in recent decades. These materials exhibit a wide range of properties depending on the nature of the metals and the ditopic ligands used. The reversibility of the coordination bonds also gives the system a dynamic character that can response to an external stimulus. By introducing chirality into these molecular systems, we can study the ability of these molecular structures to associate or disassociate to form homochiral or heterochiral species.This manuscript focuses on the synthesis and coordination chemistry of chiral ligands with C2-symmetry, i.e. bisoxazolines, bisimidazolines and derivates of 1,2-diamonocyclohexane. The complexation of two ligands to a transition metal gives rise to homoleptic ML2 complexes, in which the chirality of the ligands and the coordination geometry are important parameters for observing self-association or hetero-association of the ligands. All these complexes have been studied and characterized in the solid state or in solution and the influence of the chiral groups of the ligands has also been analysed. In order to convert these complexes into polymeric assemblies, chiral ditopic ligands have also been designed, synthesized and studied
Santillan, Guillermo A. „Coordination polymers and building blocks based on ditopic heteroscorpionate ligands“. Diss., [La Jolla] : [San Diego] : University of California, San Diego ; San Diego State University, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p3379543.
Der volle Inhalt der QuelleTitle from first page of PDF file (viewed November 17, 2009). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references.
Galbraith, Stuart G. „Ditopic ligands for the selective solvent extraction of transition metal sulfates“. Thesis, University of Edinburgh, 2004. http://hdl.handle.net/1842/10911.
Der volle Inhalt der QuelleBokolinis, Georgios. „The synthesis of novel ditopic ligands for supramolecular chemistry and sensor applications“. Thesis, University of Huddersfield, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430296.
Der volle Inhalt der QuelleGordon, Ross John. „Improved mass transport efficiency in copper solvent extraction“. Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/5673.
Der volle Inhalt der QuelleZanardi, Alessandro. „N-heterocyclic-carbene-based Ditopic and Hemicleaveable ligands for the design of improved catalysts“. Doctoral thesis, Universitat Jaume I, 2010. http://hdl.handle.net/10803/669141.
Der volle Inhalt der QuelleHigginson, Joshua J. „Synthesis and coordination chemistry of ditopic ligands capable of coordinating metal ions and interacting with anions“. Thesis, University of Huddersfield, 2015. http://eprints.hud.ac.uk/id/eprint/26444/.
Der volle Inhalt der QuelleGuo, Qianqian Verfasser], Ullrich [Akademischer Betreuer] [Englert und Sonja [Akademischer Betreuer] Herres-Pawlis. „Ditopic Ligands: Synthesis, Characterization, Selectivity and Structural Properties of their Derivatives / Qianqian Guo ; Ullrich Englert, Sonja Herres-Pawlis“. Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://d-nb.info/1162499338/34.
Der volle Inhalt der QuelleSague, Doimeadios Jorge Luis. „Silver coordination compounds with a family of ditopic ligands of varying flexibility : about chains, rings, helices and polycatenanes /“. Basel : [s.n.], 2008. http://edoc.unibas.ch/diss/DissB_8105.
Der volle Inhalt der QuelleWenzel, Marco. „Tripodale Azaliganden - Ambivalente Rezeptoren für Kationen und Anionen“. Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1210087455514-66575.
Der volle Inhalt der QuelleKunz, Kerstin [Verfasser]. „Synthese und Reaktivität Cymantrenyl-substituierter Poly(pyrazol-1-yl)borate und ditoper Tris(mercaptomethylimidazolyl)borat-Liganden / von Kerstin Kunz“. 2009. http://d-nb.info/1001903404/34.
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