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Complexes Of Transition Metal Halides With A Variety Of Heterocyclic Bases

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Complexes Of Transition Metal Halides With A Variety Of Heterocyclic Bases

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Author : Kheng Boon Heng
language : en
Publisher:
Release Date : 1967

Complexes Of Transition Metal Halides With A Variety Of Heterocyclic Bases written by Kheng Boon Heng and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Transition metal halides categories.

N Heterocyclic Carbenes In Transition Metal Catalysis

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Author : Frank Glorius
language : en
Publisher: Springer
Release Date : 2007-02-05

N Heterocyclic Carbenes In Transition Metal Catalysis written by Frank Glorius and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-02-05 with Science categories.

In this book leading experts have surveyed major areas of application of NHC metal complexes in catalysis. The authors have placed a special focus on nickel- and palladium-catalyzed reactions, on applications in metathesis reactions, on oxidation reactions and on the use of chiral NHC-based catalysts. This compilation is rounded out by an introductory chapter and a chapter dealing with synthetic routes to NHC metal complexes.

Pentamethylenetetrazole Complexes With Transition Metal Halides

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Author : Delores Maureen Sumner Bowers
language : en
Publisher:
Release Date : 1968

Pentamethylenetetrazole Complexes With Transition Metal Halides written by Delores Maureen Sumner Bowers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Halides categories.

N Heterocyclic And Mesoionic Carbene Complexes Of Rhodium And Palladium

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Author :
language : en
Publisher:
Release Date : 2015

N Heterocyclic And Mesoionic Carbene Complexes Of Rhodium And Palladium written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.

Dimeric rhodium N-heterocyclic carbene (NHC) complexes [Rh(NHC)(C2H4)Cl]2 react with a variety of other neutral donors to form heteroleptic complexes [(L)Rh(NHC)(C2H4)Cl] (L = phosphine, pyridine) or [(L)Rh(NHC)Cl] (L = 2,2'-bipyridine (bipy), 1,10-phenanthroline (phen)). The reactivity of the resulting complexes towards O2 was investigated. In particular, [(bipy)Rh(NHC)Cl] and [(phen)Rh(NHC)Cl] resulted in RhIII peroxo complexes. In contrast, [Rh(NHC)2(O2)Cl] display particularly short O-O bond lengths and are described as singlet oxygen species. Interestingly, the mode in which O2 binds is associated with the coordination number about the transition metal complex, which is related to its reducing power. [Rh(IPr)(C2H4)Cl]2 reacts with phenyl pyridine derivatives at room temperature resulting in formal C-H activations. Upon the treatment of phenyl pyridine with pinacol borane (HBPin) in the presence of a weak base and a catalytic amount of [Rh(IPr)(C2H4)Cl]2, C-H borylated products were obtained in high yield and selectivity. The borylated products can then be used as substrates in the palladium catalyzed Suzuki-Miyaura cross coupling with aryl halides. 1,2,3-Triazole mesoionic carbene (tMIC) ligands were generated upon treatment of corresponding triazolium salts with strong bases, and can be trapped in the presence of a transition metal. The synthesis of Ag-tMIC complexes proceeds by a facile and mild route upon treatment of the triazolium salt with Ag2O. The resulting Ag-tMIC complexes undergo facile transmetallation to both Pd and Rh under very mild conditions resulting in air and moisture stable metal complexes. Triazolium salts can further be metallated to Pd in the presence of weak bases, and the resulting Pd-tMIC complexes are active catalysts in the Mizoroki-Heck reaction with aryl iodides. Benzylic trifluoromethyl sulfones are competent electrophilic substrates in palladium catalyzed cross coupling reactions, resulting in the formation of triarylmethanes in high yields under mild conditions. These substrates are conveniently synthesized and are highly reactive starting materials with phenyl boronic acids in the presence of a Pd-NHC catalyst. The structure of the Pd-NHC precatalyst is crucial, as only [(NHC)Pd(allyl)Cl] type complexes appear to be effective. These complexes can be conveniently synthesized upon the treatment of the corresponding imidazolium salt with a strong base and [Pd(allyl)Cl]2.

Transition Metal Complexes Of Heterocyclic Ligands

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Author : Raymond John Dosser
language : en
Publisher:
Release Date : 1970

Transition Metal Complexes Of Heterocyclic Ligands written by Raymond John Dosser and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with categories.

Applications Of Transition Metal Complexes In Heterocyclic Synthesis

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Author : R. M. O'Neil
language : en
Publisher:
Release Date : 1980

Applications Of Transition Metal Complexes In Heterocyclic Synthesis written by R. M. O'Neil and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Organopalladium compounds categories.