Organochromium Chemistry with Formally Neutral, Chelating Ancillary Ligands PDF Download
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Author: Kevin Allen Kreisel
Publisher: ProQuest
ISBN: 9780549388425
Category : Chelates
Languages : en
Pages :
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Book Description
This dissertation describes research on chromium complexes with formally neutral, chelating ligands. The goal of this research is the fundamental study of organochromium chemistry with the hope of preparing Cr(II) complexes that are active for the polymerization or oligomerization of ethylene. This would provide evidence for Cr(II) to be active for these processes. Chapter 1 of this dissertation describes the synthesis and characterization of a series of chromium complexes supported by a chelating N-heterocyclic carbene ligand. The second chapter details the preparation and structural characterization of several complexes of chromium supported by several diimine ligands. The third chapter examines the organochromium chemistry derived from the complexes described in chapter 2. The final chapter entails the synthesis of the shortest metal-metal distance ever reported.
Author: Kevin Allen Kreisel
Publisher: ProQuest
ISBN: 9780549388425
Category : Chelates
Languages : en
Pages :
Get Book Here
Book Description
This dissertation describes research on chromium complexes with formally neutral, chelating ligands. The goal of this research is the fundamental study of organochromium chemistry with the hope of preparing Cr(II) complexes that are active for the polymerization or oligomerization of ethylene. This would provide evidence for Cr(II) to be active for these processes. Chapter 1 of this dissertation describes the synthesis and characterization of a series of chromium complexes supported by a chelating N-heterocyclic carbene ligand. The second chapter details the preparation and structural characterization of several complexes of chromium supported by several diimine ligands. The third chapter examines the organochromium chemistry derived from the complexes described in chapter 2. The final chapter entails the synthesis of the shortest metal-metal distance ever reported.
Author: Jonathan G. Rudick
Publisher: Frontiers Media SA
ISBN: 2889634841
Category :
Languages : en
Pages : 100
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Book Description
This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Author: Jon Paul Janet
Publisher: American Chemical Society
ISBN: 0841299005
Category : Science
Languages : en
Pages : 189
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Book Description
Recent advances in machine learning or artificial intelligence for vision and natural language processing that have enabled the development of new technologies such as personal assistants or self-driving cars have brought machine learning and artificial intelligence to the forefront of popular culture. The accumulation of these algorithmic advances along with the increasing availability of large data sets and readily available high performance computing has played an important role in bringing machine learning applications to such a wide range of disciplines. Given the emphasis in the chemical sciences on the relationship between structure and function, whether in biochemistry or in materials chemistry, adoption of machine learning by chemistsderivations where they are important
Author: Stefan Bräse
Publisher: Springer Science & Business Media
ISBN: 3709113121
Category : Science
Languages : en
Pages : 304
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Book Description
The biological activity of mycotoxins ranges from weak and/or sometimes positive effects, such as antibacterial activity (see penicillin derivatives derived from Penicillium strains) to strong mutagenic (e. g. aflatoxins, patulin), carcinogenic (e. g. aflatoxins), teratogenic, neurotoxic (e. g. ochratoxins), nephrotoxic (e. g. fumonisins, citrinin), hepatotoxic, and immunotoxic (e. g. ochratoxins, diketopiperazines) activity. Nowadays, many laboratories around the world are specialized in the detection of mycotoxins in food products and contaminated material found in housing. In this volume, a focus on the most important classes of mycotoxins is provided and their chemistry of the last ten years is discussed. In each Section, the individual biological impact is outlined. Sections are arranged according to mycotoxin classes (e. g. aflatoxins) and/or structural classes (e. g. resorcinyl lactones, diketopiperazines). The biology of mycotoxins is also described.
Author: Gregory L. Geoffroy
Publisher: John Wiley & Sons
ISBN: 0470147431
Category : Science
Languages : en
Pages : 366
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Book Description
This volume is devoted entirely to inorganic and organometallic stereochemical subjects. Discusses the systematic notations that have been developed to satisfy the needs for a rational and systematic stereochemical nomenclature. Reviews the stereochemical aspects of the changes of bonding at carbon centers induced by metals, either catalytically or stoiciometrically. Also reviews the major achievements in current stereochemical research—the synthesis of asymmetric compounds mediated by transition metals. Discusses the structures of transition metal carbonyl clusters, summarizing recent progress in this expanding area and providing a semiquantitative rationalization of the structures for these clusters.
Author: Wilhelm Bartmann
Publisher: VCH Publishers
ISBN:
Category : Biochemistry
Languages : en
Pages : 354
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Book Description
Author: Helmut Werner
Publisher: Springer Science & Business Media
ISBN: 0387098488
Category : Science
Languages : en
Pages : 361
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Book Description
Since the discovery of ferrocene and the sandwich-type complexes, the development of organometallic chemistry took its course like an avalanche and became one of the scientific success stories of the second half of the twentieth century. Based on this development, the traditional boundaries between inorganic and organic chemistry gradually disappeared and a rebirth of the nowadays highly important field of homogeneous catalysis occurred. It is fair to say that despite the fact that the key discovery, which sparked it all off, was made more than 50 years ago, organometallic chemistry remains a young and lively discipline.
Author: Silvia Diez-Gonzalez
Publisher: Royal Society of Chemistry
ISBN: 1782626816
Category : Science
Languages : en
Pages : 637
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Book Description
In less than 20 years N-heterocyclic carbenes (NHCs) have become well-established ancillary ligands for the preparation of transition metal-based catalysts. This is mainly due to the fact that NHCs tend to bind strongly to metal centres, avoiding the need of excess ligand in catalytic reactions. Also, NHC‒metal complexes are often insensitive to air and moisture, and have proven remarkably resistant to oxidation. This book showcases the wide variety of applications of NHCs in different chemistry fields beyond being simple phosphine mimics. This second edition has been updated throughout, and now includes a new chapter on NHC‒main group element complexes. It covers the synthesis of NHC ligands and their corresponding metal complexes, as well as their bonding and stereoelectronic properties and applications in catalysis. This is complemented by related topics such as organocatalysis and biologically active complexes. Written for organic and inorganic chemists, this book is ideal for postgraduates, researchers and industrialists.
Author: Anthony J. Burke
Publisher: John Wiley & Sons
ISBN: 3527335188
Category : Science
Languages : en
Pages : 530
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Book Description
This "hands-on" approach to the topic of arylation consolidates the body of key research over the last ten years (and up to around 2014) on various catalytic methods which involve an arylation process. Clearly structured, the chapters in this one-stop resource are arranged according to the reaction type, and focus on novel, efficient and sustainable processes, rather than the well-known and established cross-coupling methods. The entire contents are written by two authors with academic and industrial expertise to ensure consistent coverage of the latest developments in the field, as well as industrial applications, such as C-H activation, iron and gold-catalyzed coupling reactions, cycloadditions or novel methodologies using arylboron reagents. A cross-section of relevant tried-and-tested experimental protocols is included at the end of each chapter for putting into immediate practice, along with patent literature. Due to its emphasis on efficient, "green" methods and industrial applications of the products concerned, this interdisciplinary text will be essential reading for synthetic chemists in both academia and industry, especially in medicinal and process chemistry.
Author: Jiro Tsuji
Publisher: John Wiley & Sons
ISBN: 9780471560272
Category : Science
Languages : en
Pages : 500
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Book Description
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)
