Synthesis Reactivity And Catalytic Studies Of Transition Metal Complexes Of Chelating Cyclic And Acyclic Diaminocarbene Ligands
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Synthesis Reactivity And Catalytic Studies Of Transition Metal Complexes Of Chelating Cyclic And Acyclic Diaminocarbene Ligands
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Author : Yoshitha Anju Wanniarachchi
language : en
Publisher:
Release Date : 2008
Synthesis Reactivity And Catalytic Studies Of Transition Metal Complexes Of Chelating Cyclic And Acyclic Diaminocarbene Ligands written by Yoshitha Anju Wanniarachchi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Ligand Design In Metal Chemistry
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Author : Mark Stradiotto
language : en
Publisher: John Wiley & Sons
Release Date : 2016-09-01
Ligand Design In Metal Chemistry written by Mark Stradiotto and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-09-01 with Science categories.
The design of ancillary ligands used to modify the structural and reactivity properties of metal complexes has evolved into a rapidly expanding sub-discipline in inorganic and organometallic chemistry. Ancillary ligand design has figured directly in the discovery of new bonding motifs and stoichiometric reactivity, as well as in the development of new catalytic protocols that have had widespread positive impact on chemical synthesis on benchtop and industrial scales. Ligand Design in Metal Chemistry presents a collection of cutting-edge contributions from leaders in the field of ligand design, encompassing a broad spectrum of ancillary ligand classes and reactivity applications. Topics covered include: Key concepts in ligand design Redox non-innocent ligands Ligands for selective alkene metathesis Ligands in cross-coupling Ligand design in polymerization Ligand design in modern lanthanide chemistry Cooperative metal-ligand reactivity P,N Ligands for enantioselective hydrogenation Spiro-cyclic ligands in asymmetric catalysis This book will be a valuable reference for academic researchers and industry practitioners working in the field of ligand design, as well as those who work in the many areas in which the impact of ancillary ligand design has proven significant, for example synthetic organic chemistry, catalysis, medicinal chemistry, polymer science and materials chemistry.
Ligand Platforms In Homogenous Catalytic Reactions With Metals
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Author : Ryohei Yamaguchi
language : en
Publisher: John Wiley & Sons
Release Date : 2014-10-15
Ligand Platforms In Homogenous Catalytic Reactions With Metals written by Ryohei Yamaguchi and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-10-15 with Technology & Engineering categories.
Serving as a user's manual for synthetic organic and catalytic chemists, this book guides chemists in the design and choice of ligands to catalyze organic reactions and apply the results for more efficient, green, and practical synthesis. • Focuses on the role of ligands in metal complexes that catalyze green organic transformations: a hot topic in the area of organic synthesis and green chemistry • Offers a comprehensive resource to help readers design and choose ligands and understand selectivity/reactivity characteristics • Addresses a gap by taking novel ligand approaches and including up-to-date discussion on hydrogen transfers and reactions • Presents important industrial perspective and provides rational explanations of ligand effects, impacts, and novelty
Novel Diaminocarbene Ligands And Their Applications In Ruthenium Based Metathesis Catalysts
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Author : Evelyn Louise Rosen
language : en
Publisher:
Release Date : 2010
Novel Diaminocarbene Ligands And Their Applications In Ruthenium Based Metathesis Catalysts written by Evelyn Louise Rosen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
With the ever expanding utility of transition metal catalysis, there has been a thrust both to develop catalysts with unique selectivites or activites, and to understand the factors which govern these characteristics at both a fundamental and practical level. Olefin metathesis has become an essential reaction for the synthesis of small molecules in addition to polymeric materials. We have pursued two distinct ligand classes based on diaminocarbenes with novel architectures to address specific limitations within this useful class of reactions: 1) limited access to polymeric materials with controlled microstructures and 2) poor stereoselectivity in Ru-catalyzed cross-metathesis (CM) reactions. Numerous phosphines and N-heterocyclic carbenes (NHCs) have been used as ligands for Ru metathesis catalysts, and the resulting activity is very sensitive to their steric and electronic nature. We envisioned that we could take advantage of this dependence by developing a catalyst with tunable ligand donicity. Redox-switchable ligands can lead to catalysts whose selectivity and/or activity are dependent upon the ligand oxidation state. Towards this purpose, we have developed a ligand which incorporates a 1,1'-disubstituted ferrocene moiety into the backbone of a diaminocarbene (FcDAC). Upon ligation of FcDAC to various transition metals, we were able to use cyclic voltammetry and a spectroelectrochemical FT-IR experiment to show electronic communication between FcDAC and the coordinated metal. We then pursued Ru metathesis catalysts incorporating these ligands. The ring-opening metathesis polymerization of 1,5-cyclooctadiene was studied using [(FcDAC)(PPh3)Cl2Ru=(3-phenylindenylid-2-ene)] as the catalyst. Chemical redox reactions were used to establish the ability of FcDAC to impart redox-tunable properties to Ru metathesis catalysts. A new ligand class pioneered in our group, N-aryl, N-alkyl acyclic diaminocarbenes (ADCs), was also studied in various Ru metathesis catalysts. To our delight, these catalysts showed lower E : Z ratios than analogous NHC ligands in two representative CM reactions. We also investigated the conformational diversity of these differentially substituted ADCs given their ability to rotate about their C-N bonds, in particular, to determine how this might influence their donicity. Complexes of the type [(ADC)Ir(COD)Cl] and [(ADC)Ir(CO)2Cl] were studied, given the wealth of structural and spectral data available for analogous compounds incorporating related ligand classes. Different conformations resulted depending on the N-substituents and the nature of the metal complex. Interestingly, the electron donating ability of ADC ligands was found to depend on their conformation, as evidenced by FT-IR and cyclic voltammetry. This established a new avenue for tuning the donor properties of differentially substituted ADC ligands. The unique properties of these novel ligand classes were demonstrated in Ru metathesis catalysts. However, on a broader level, these ligands are expected to have utility in diverse catalytic applications.
Transition Metal Reagents And Catalysts
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Author : Jiro Tsuji
language : en
Publisher: John Wiley & Sons
Release Date : 2002-08-16
Transition Metal Reagents And Catalysts written by Jiro Tsuji and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-08-16 with Science categories.
Im Laufe der vergangenen 35 Jahre wurden unzahlige Synthesewege entwickelt, bei denen Ubergangsmetallkomplexe entweder als Reagenzien oder als Katalysatoren fungieren. Dieses Buch bietet besonders denjenigen Synthesechemikern interessante und moderne Einblicke, die bisher noch nicht mit den vielfaltigen Moglichkeiten der Organometallchemie mit Ubergangsmetallen vertraut sind. Zu wichtigen ubergangsmetallkatalysierten Reaktionen werden Anwendungsbeispiele diskutiert. (01/00)
Designs Syntheses And Applications Of N Heterocyclic And Acyclic Diaminocarbene Metal Complexes
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Author : Sebastien Inagaki
language : en
Publisher:
Release Date : 2012
Designs Syntheses And Applications Of N Heterocyclic And Acyclic Diaminocarbene Metal Complexes written by Sebastien Inagaki and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
The design of a chiral isoquinoline-based N-heterocyclic carbene was revisited. Two ligands, one containing a Lewis base, were synthesized. The corresponding carbene-metal complexes were then used in different catalytic and asymmetric systems to seek greater reactivity and enantioselectivity. Acyclic diaminocarbene ligands have also a potential in asymmetric synthesis. However, their backbones make it more challenging to control their enantioselectivity. Simple achiral ADC-metal complexes could also achieve good reactivity with a new method of generating them in situ. A new ADC-iridium complex was synthesized and its X-ray structure was obtained showing the presence of only one conformer of the ligand.
Preparation Characterisation And Reactivity Of Low Oxidation State D Block Metal Complexes Stabilised By Extremely Bulky Amide Ligands
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Author : Jamie Hicks
language : en
Publisher: Springer
Release Date : 2018-06-29
Preparation Characterisation And Reactivity Of Low Oxidation State D Block Metal Complexes Stabilised By Extremely Bulky Amide Ligands written by Jamie Hicks and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-29 with Science categories.
This thesis describes the synthesis and characterization of numerous metal-metal bonded complexes that are stabilized by extremely bulky amide ligands. It provides a comprehensive overview of the field, including discussions on groundbreaking complexes and reactions, before presenting in detail, exciting new findings from the PhD studies. The thesis appeals to researchers, professors and chemistry undergraduates with an interest in inorganic and/or organometallic chemistry.
Transition Metal Complexes With P N Ligands And Silylenes
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Author : Eva Neumann
language : en
Publisher:
Release Date : 2006
Transition Metal Complexes With P N Ligands And Silylenes written by Eva Neumann and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
Direct Synthesis Of Metal Complexes
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Author : B.I. Kharisov
language : en
Publisher: Elsevier
Release Date : 2018-04-19
Direct Synthesis Of Metal Complexes written by B.I. Kharisov and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-04-19 with Science categories.
Direct Synthesis of Metal Complexes provides in-depth coverage of the direct synthesis of coordination and organometallic compounds. The work is primarily organized by methods, but also covers highly relevant complexes, such as metal-polymer coordination compounds. This updated reference discusses recent developments in cryosynthesis, electrosynthesis, and tribosynthesis (popular as it doesn’t require organic solvents), with special attention paid to ‘greener’ methodologies and approaches. Additionally, the book describes physical methods of zero-valent metal interaction with organic matter, including sputtering, ultrasonic treatment and synthesis in ionic liquids. The book presents completely new content as a follow-up to the 1999 Elsevier Science publication Direct Synthesis of Coordination and Organometallic Compounds that was edited by Dr. Garnovskii and Dr. Kharisov. Covers current methods and techniques of metal interactions with organic media leading to metal chelates, adducts, di- and polymetallic complexes, metal-containing macrocycles, supported coordination compounds (i.e., metal complexes on carbon nanotubes), and more Describes reactivities of distinct forms of elemental metals (powders, sheets, nanoparticles (including a host of less-common metal nanostructures) with organic phase (liquid, solid and gaseous) and water Includes experimental procedures, with examples of direct synthesis, at the end of each chapter
Transition Metal Complexes With Di Pentadienyl Ligands
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Author : Weiqing Weng
language : en
Publisher:
Release Date : 1991
Transition Metal Complexes With Di Pentadienyl Ligands written by Weiqing Weng and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Ligands categories.
