Download or read book Zerovalent Palladium N heterocyclic Carbene Complexes for Transfer Hydrogenation of Alkynes written by Peter Hauwert and published by . This book was released on 2011 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Zero Valent N heterocyclic Carbene Complexes of Nickel Palladium and Platinum written by Nicolas David Stephane Clement and published by . This book was released on 2005 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book N Heterocyclic Carbenes in Transition Metal Catalysis and Organocatalysis written by Catherine S.J. Cazin and published by Springer Science & Business Media. This book was released on 2010-10-04 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: N-Heterocyclic Carbenes in Transition Metal Catalysis and Organocatalysis features all catalytic reactions enabled by N-heterocyclic carbenes (NHCs), either directly as organocatalysts or as ligands for transition metal catalysts. An explosion in the use of NHCs has been reported in the literature during the past seven years making this comprehensive overview highly apropos. The book begins with an introductory overview of NHCs which could have been subtitled all you need to know about NHCs. The main body of the book is dedicated to applications of NHCs in catalysis. In addition to the success stories of NHCs in metathesis, NHCs in cross coupling and more recently NHCs in organocatalysis, all other less publicized areas are also covered. As the success of NHCs is generally attributed to their potential to stabilize metal centres, the inclusion of a chapter on the decomposition of NHC catalysts is pertinent. The book closes with a chapter describing the applications of NHCs in industrial processes, which is the first coverage of its kind, and brings a unique industrial context to this book. Included in this book: Historical aspects of NHCs Synthetic pathways to NHC precursors, free NHCs and complexes Methods of characterisation of NHCs and related complexes Electronic properties of NHCs Steric properties of NHCs and models for their description NHCs for metathesis and cross-coupling reactions NHCs as organocatalysts NHC Transition-Metal mediated oxidations, additions to multiple bonds, polymerisation and oligomerisation, cyclisations, direct arylations, reactions involving CO, C-F and C-H bond activation, ... Decomposition of NHC-containing catalysts Industrial applications involving NHC-containing catalysts N-Heterocyclic Carbenes in Transition Metal Catalysis and Organocatalysis provides a fresh view of NHCs since most contributors are young emerging researchers in the field of homogeneous catalysis using NHCs. This group of contributors is complemented by highly established academic researchers and an industrialist. This book is comprehensive, from the basic features of NHCs to the latest advances, hence it is suitable for both the novice and the expert.

Download or read book Novel Palladium N heterocyclic Carbene Complexes as Catalysts for Aminations written by Lisa Rae Titcomb and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book N Heterocyclic Carbenes in Transition Metal Catalysis written by Frank Glorius and published by Springer Science & Business Media. This book was released on 2007 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book N Heterocyclic Carbenes in Synthesis written by Steven P. Nolan and published by John Wiley & Sons. This book was released on 2006-12-13 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first handbook to focus solely on the application of N-heterocyclic carbenes in synthesis covers metathesis, organocatalysis, oxidation and asymmetric reactions, along with experimental procedures. Written by leading international experts this is a valuable and practical source for every organic chemist.

Download or read book Novel Expanded Ring N heterocyclic Carbenes written by Katharine R. Sampford and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The work presented in this thesis is concerned with the synthesis, characterisation, and application in catalysis of mono- and bis-expanded ring (including bicyclics) Nheterocyclic carbenes (NHCs) with emphasis on their coordination to palladium, silver, rhodium, gold, copper, and nickel. Chapter two provides the synthesis and characterisation of a series of bis-expanded ring NHC precursors along with the attempted synthesis of mixed 5- and 6-membered types. The attempted coordination of the bis-NHC precursors to palladium did not produce the desired complexes rather a rearrangement occurred to give nitrogen coordinated species through elimination of the linking group between the two heterocycles. Chapter three explores the synthesis and characterisation of a range of novel alkylated bicyclic NHC precursors including the dimethyl, diethyl, and diisopropyl derivatives, and their coordination to rhodium(I). The increased steric demand (iPr > Et > Me) of the exocyclic substituent leads to a larger NCN angle across the series. The rhodium complexes exist as a mixture of two isomers (syn-alkene and syn-chloride) in a 2:1 ratio resulting from restricted rotation about the Rh-CNHC bond. The complexes are active for the transfer hydrogenation of ketones with conversions up to 37 %. Chapter four discusses the coordination chemistry of monocyclic expanded-ring and bicyclic NHCs with copper(I). The expanded ring NHC copper(I) complexes of the type [Cu(NHC)X] show typical Ccarbene-Cu-X bond angles of around 180 °. However, the related complex of the mesityl bicyclic NHC shows an apparent non covalent interaction between the metal and the mesityl ring causing a deviation of the Ccarbene-Cu-X bond away from linearity. The catalytic activity of the expanded ring copper(I) halide complexes for hydrosilylation was explored but were shown to be inactive. Chapter five concerns gold(I) complexes of expanded-ring and bicyclic NHCs. A small crystallographic library of complexes enabled the percentage buried volumes to be determined. As expected, these were large for the aromatic substituted expanded ring complexes of type [Au(NHC)X] but appreciably smaller (more akin to the common 5- membered NHCs) for the bicyclic systems and the alkylated expanded ring systems. The catalytic activity of the complexes in the hydration of alkynes was explored with iv conversions of up to 100 % being observed. Selectivities were noticeably better than those reported for the [Au(6-DIPP)Cl] and [Au(7-DIPP)Cl] with values of around 30:70. Chapter six moves into the coordination and characterisation of a series of highly sensitive expanded ring nickel(I) complexes. Due to the paramagnetic nature of these compounds analysis using EPR was achieved. This showed that the nickel(I) complexes all exhibited orthorhombic g values.

Download or read book N heterocyclic Carbene iron ii Complexes written by Monisola Itohan Ikhile and published by . This book was released on 2011 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Palladium Complexes Bearing Nitrogen Donor Functionalized N heterocyclic Carbene Ligands written by Stefan Warsink and published by . This book was released on 2011 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Catalytic Applications of Nickel and Palladium N heterocyclic Carbene Complexes written by Alexandra Katharine de Kirian Lewis and published by . This book was released on 2004 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design Synthesis and Catalytic Activity of Di i N i Heterocyclic Carbene Complexes of Nickel and Palladium written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book N Heterocyclic and Mesoionic Carbene Complexes of Rhodium and Palladium written by and published by . This book was released on 2015 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Palladium and Gold N heterocyclic Carbene Complexes written by Caroline Magdalene Zinser and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Application of Palladium N heterocyclic Carbene Complexes in Catalysis written by Katherine Arentsen and published by . This book was released on 2006 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis of Novel N heterocyclic Carbene palladium Complexes and Their Catalytic Activity written by Daniel P. Guest and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transformations Mediated by Palladium N heterocyclic carbene Complexes written by Israel Conesa Lerma and published by . This book was released on 2007 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Catalytic Studies of Low Valent Palladium N heterocyclic Carbene Complexes written by Anung Riapanitra and published by . This book was released on 2009 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: