Author: Janet L. WedgwoodPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Mono- and Heterobimetallic Complexes of the Early and Late Transition Metals with Alkylsulphonated Phosphines, and Their Antitumour Properties
British National Bibliography for Report Literature
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 114
Book Description
Transition Metal Complexes as Drugs and Chemotherapeutic Agents
Author: N. FarrellPublisher: Springer Science & Business Media
ISBN: 9401175683
Category : Science
Languages : en
Pages : 304
Book Description
When this book was first conceived as a project the expanding interest in the clinical use of platinum and gold complexes made a survey of the relevant biological properties of metal complexes timely and appropriate. This timeliness has not diminished during the gestation and final publica tion of the manuscript. The introduction contains an explanation of the layout and approach to the book, which I wrote as an overall survey of the wide variety of biological properties of metal complexes. Hopefully, the reader will see the parallels in mechanisms and behavior, even in different organisms. The writing was considerably helped by the enthusiasm and confidence (totally unearned on my part) in the project of Professor Brian James and lowe him my special thanks. I also owe a great debt of gratitude to my colleagues, and especially to Eucler Paniago, of the Universidade Federal de Minas Gerais, for their comprehension and for the initial leave of absence which allowed me to begin the project. To those who read some or all of the manuscript and made suggestions, Bernhard Lippert, Kirsten Skov, and Tom Tritton, as well as the editor's reviewer I am also grateful. As usual, the final responsibility for errors or otherwise rests with the author.
Early-Late Heterobimetallic Complexes Linked by Phosphinoamide Ligands
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Recent attention in the chemical community has been focused on the energy efficient and environmentally benign conversion of abundant small molecules (CO2, H2O, etc.) to useful liquid fuels. This project addresses these goals by examining fundamental aspects of catalyst design to ultimately access small molecule activation processes under mild conditions. Specifically, Thomas and coworkers have targetted heterobimetallic complexes that feature metal centers with vastly different electronic properties, dictated both by their respective positions on the periodic table and their coordination environment. Unlike homobimetallic complexes featuring identical or similar metals, the bonds between metals in early/late heterobimetallics are more polarized, with the more electron-rich late metal center donating electron density to the more electron-deficient early metal center. While metal-metal bonds pose an interesting strategy for storing redox equivalents and stabilizing reactive metal fragments, the polar character of metal-metal bonds in heterobimetallic complexes renders these molecules ideally poised to react with small molecule substrates via cleavage of energy-rich single and double bonds. In addition, metal-metal interactions have been shown to dramatically affect redox potentials and promote multielectron redox activity, suggesting that metal-metal interactions may provide a mechanism to tune redox potentials and access substrate reduction/activation at mild overpotentials. This research project has provided a better fundamental understanding of how interactions between transition metals can be used as a strategy to promote and/or control chemical transformations related to the clean production of fuels. While this project focused on the study of homogeneous systems, it is anticipated that the broad conclusions drawn from these investigations will be applicable to heterogeneous catalysis as well, particularly on heterogeneous processes that occur at interfaces in multicomponent systems.
Phosphine, Arsine, and Stibine Complexes of the Transition Elements
Author: Charles Andrew McAuliffePublisher: Elsevier Science & Technology
ISBN:
Category : Complex compounds
Languages : en
Pages : 568
Book Description
Transition Metal Complexes of Phosphorus, Arsenic and Antimony Ligands
Author: Charles Andrew McAuliffePublisher: John Wiley & Sons
ISBN:
Category : Science
Languages : en
Pages : 458
Book Description
Transition Metal Complexes of Phosphorus, Arsenic and Antimony Ligands
Author: Charles Andrew McAuliffePublisher:
ISBN: 9781349815609
Category : Antimony compounds
Languages : en
Pages : 0
Book Description
Late Transition Metal Complexes of Bulky Mono- and Bi-nucleaeting Ligands
Author: Yohan D. M. ChampouretSynthesis, Characterization, and Reactivity of Novel Bis(phosphinoamide) Zr/Co Heterobimetallic Complexes Bearing N-isopropyl Phosphinoamide Ligands
Author: Nathaniel C. McCutcheonPublisher:
ISBN:
Category : Chemistry, Inorganic
Languages : en
Pages : 0
Book Description
In light of growing environmental and economic concerns, there is a motivated effort to mimic the two-electron reactivity of precious transition metal complexes using more abundant, affordable, and non-toxic first row transition metals. The main challenge in this effort is that more sustainable first row transition metals do not readily undergo two-electron redox processes, which comprise many industrially relevant catalytic mechanisms, instead preferring to participate in one-electron reactions. One of several ways the Thomas group has approached this challenge is by tethering a Lewis acidic early metal to an electron-rich late metal via a bifunctional phosphinoamide ligand framework, allowing access to highly reduced late metal centers that have been shown to more favorably undergo two-electron redox processes. This thesis explores how the electron-donating properties of the phosphinoamide ligand impact the structure and reactivity of a novel series of bis(phosphinoamide) Zr/Co complexes. This series employs a more electron-donating iPrNPiPr2- ligand, as opposed to the XylNPiPr2- ligand previously featured in the group’s bis(phosphinoamide) Zr/Co systems. The relative electron density at the cobalt center is qualified using multiple spectroscopic and computational methods, and structural comparisons are made between analogous Zr/Co complexes bearing different ligands. These data are used to determine how increasing the electron-donating ability of the bis(phosphinoamide) framework impacts the thermodynamics of bond activation and the overall structure-reactivity relationship of Zr/Co complexes.
From Early to Late Transition Metal Complexes
Author: Stefan KöcherPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Die vorliegende Arbeit befasst sich mit der Synthese, dem Reaktionsverhalten, den Festkörperstukturen und den elektronischen Eigenschaften von neuartigen Übergansmetall-komplexen der Gruppen 4, 8 und 10 des Peridoensystems der Elemente. Die Arbeit befasst sich unter anderem mit der Darstellung von Alkyloxy- und Aryloxy-substituierten Titanocenverbindungen des Typs [Ti](Cl)(OR) {[Ti] = (C5H5SiMe3)2Ti; R = organischer Rest). Mittels cyclovoltammetrischer Experimente und anhand von Festkörpestrukturen wird der elektronische Einfluss der organischen Reste auf das Metallzentrum untersucht. Weiterhin befasst sich die Arbeit mit der Synthese von in para-Position substituierten NCN-Pincerverbindungen. Durch die Wahl des Substituenten in para-Postition sowie des Übergangsmetalls der Gruppe 10 des Periodensystems der Elemente ist es möglich, verschiedenartig gerichtete polymere Strukturen zu bilden. Ein weiterer Schwerpunkt der vorliegenden Arbeit liegt in der Synthese und Untersuchung der elektronischen Eigenschaften von NCN-Pincer-substituierten Ferrocenen. Der Einfluss der NCN-Pincer auf die Elektronendichte des Ferrocens wird bestimmt sowie die Eignung derartiger Systeme als elektrochemische Sensoren zur molekularen Erkennung von Schwefeldioxid wird untersucht.