EBookClubs

Read Books & Download eBooks Full Online

EBookClubs

Read Books & Download eBooks Full Online

Book Synthesis and Photophysical Studies of Copper II and Copper I Complexes with a Tetradentate Ligand Based on 2 9 dimethyl 1 10 phenanthroline

Download or read book Synthesis and Photophysical Studies of Copper II and Copper I Complexes with a Tetradentate Ligand Based on 2 9 dimethyl 1 10 phenanthroline written by Yuan Yao and published by . This book was released on 1991 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Characterization of Some Copper II Complexes with Ligands Formed with 14 membered Ring Amine Ligands

Download or read book Synthesis and Characterization of Some Copper II Complexes with Ligands Formed with 14 membered Ring Amine Ligands written by Scott Jackson Dantley and published by . This book was released on 1995 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Application of Copper I and II Complexes of Monoanionic Tripodal Tetradentate Ligands for the Determination of Structure activity Relationships in ATRP

Download or read book Synthesis and Application of Copper I and II Complexes of Monoanionic Tripodal Tetradentate Ligands for the Determination of Structure activity Relationships in ATRP written by Jocelyn Marie Goodwin and published by . This book was released on 2005 with total page 1074 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Chiral and Achiral Copper II and Nickel II Complexes with Novel Multidentate Ligands

Download or read book Chiral and Achiral Copper II and Nickel II Complexes with Novel Multidentate Ligands written by Molly A. O'Connor and published by . This book was released on 2013 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bidentate, tetradentate, and hexadentate ligands, with N2, N4, and S2N4 donor sets were complexed with Cu(II) and Ni(II) to form chiral and achiral chelates in an attempt to prepare complexes that allowed for the access of multiple oxidation states through electrochemical methods. The bidentate ligands were prepared from pyrrole-2-carboxaldehyde and chiral and achiral amines and anilines, and were complexed with the desired metal in a 2:1 ratio, with chiral ligands resulting in chiral complexes. Analogous ligands with N4 coordination spheres were also prepared using pyrrole-2-carboxaldyhyde and various diamines, and were complexed in a 1:1 fashion. The tetradentate ligands were prepared using vinylpyridine and chiral piperazine derivatives to form both enantiomers of the chiral complexes, as well as similar non-chiral mono and dinuclear complexes using achiral derivatives of piperazine and homopiperazine. The hexadentate ligands were synthesized from 2-hydrazinopyridine and alkyl and aryl bridged dithio-diketo precursors, which were prepared using either a N,N,N-triethyl-N-(propan-2-onyl)ammonium or N,N,N-triethyl-N-(phenylethan-2-onyl)ammonium chloride salt and a range of dithiols. Synthetic, crystallographic, and absorption data will be presented as well as circular dichroism (CD) data for the chiral complexes and magnetic data for the dinuclear complex. Complexes were also characterized using electrochemistry and ESR.

Book Synthesis and Characterization of Some Dimeric Copper II Complexes

Download or read book Synthesis and Characterization of Some Dimeric Copper II Complexes written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis AndRreactivity of Copper I Copper II Platinum II and Platinum IV Complexes with Non dative Heteroatomic Ligands

Download or read book Synthesis AndRreactivity of Copper I Copper II Platinum II and Platinum IV Complexes with Non dative Heteroatomic Ligands written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Examples of late transition metal complexes with amido, alkoxo and sulfido ligands are relatively rare in part due to enhanced reactivity based on nucleophilicity and basicity of the heteroatomic ligand (X). The highly nucleophilic and basic character of formally anionic X ligands coordinated to metal centers with low oxidation states is attributable to the disruption of ligand-to-metal pi-bonding. Examples of common reactivity for these systems include nucleophilic addition reactions, insertions of unsaturated substrates, acid/base chemistry with acidic C-H bonds and C-H activation reactions with aromatic substrates. In addition to fundamental reactivity studies, these complexes also offer opportunities for incorporation into catalytic processes. Late transition metal complexes with non-dative X ligands have been implicated in several C-X bond forming reactions and have been demonstrated to activate non-polar substrates. Thus, in order to advance the understanding of these reactive systems and to exploit the prospects for synthetic applications toward small molecule transformations, further study is warranted. Presented herein is the study of (IPr)Cu(NR2), (IPr)Cu(OR) and (IPr)Cu(SR) {IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene} complexes in the catalytic hydroamination of electron-deficient olefins toward regioselective formation of C-N, C-O and C-S bonds. The substrate scope encompasses alkyl and aryl amines, including primary and secondary variants, as well as alcohols and thiols. Olefins with cyano, acyl, and ester functionalities and vinylarenes are reactive. In a demonstration of potential application, the hydroamination of p-nitrostyrene with N-methylbenzylamine by (IPr)Cu(NHPh) provides a straight-forward single-step route to an anti-arrhythmic agent. Mechanistic studies are consistent with a reaction pathway that involves intermolecular nucleophilic addition of the Cu-amido to free olefin. In an effort to obtain more active catalyst systems that.

Book Synthesis Characterization and Antimicrobial Activity of Copper II Complexes of Some Hydroxybenzaldimines and Their Derivatives

Download or read book Synthesis Characterization and Antimicrobial Activity of Copper II Complexes of Some Hydroxybenzaldimines and Their Derivatives written by Abdullahi Owolabi Sobola and published by . This book was released on 2012 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Copper II and Ruthenium II Complexes from Polydentate Ligands

Download or read book Copper II and Ruthenium II Complexes from Polydentate Ligands written by David Rey Ireland and published by . This book was released on 2018 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis covers two separate projects, one involving copper(II) complexes and the other ruthenium(II) complexes. Part one glosses the roles played by copper in biological systems, various types of copper based enzymes, and some of the metal complexes used to mimic systems involving copper in biology. Part two covers a novel synthesis of a new dipyrromethene and its subsequent complexation with two Ru(bpy)2Cl2 molecules. Electronic absorption spectra and cyclic voltammograms were recorded for all complexes. Little can be drawn from the experiments involving the copper complexes as they were largely unsuccessful. It is our hope, however, that the results of the experiments with the ruthenium(II) dipyrromethene complex will contribute to the growing body of research on phototheranostics and/or solar cells.

Book Study of complexes of cu ii with the ligands tyrosine and phosphocreatine in solid phase

Download or read book Study of complexes of cu ii with the ligands tyrosine and phosphocreatine in solid phase written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: O estudo da síntese e das propriedades de complexos de Cu (II) comaminoácidos e compostos de interesse biológico, tanto em solução aquosa comona fase sólida, pode permitir avaliar o comportamento desses complexos emorganismos vivos. Assim, neste trabalho, realizou-se um estudo de complexos deCu (II) com os ligantes fosfocreatina e tirosina na fase sólida. As sínteses foram realizadas em meio aquoso, utilizando-se soluções 0,2mol. L-1 de cobre (II), de adenosina trifosfato (ATP) e de tirosina (Tyr), no sistemaCu(II)-ATP-Tyr, e de cobre (II), de fosfocreatina (PCr) e de tirosina (Tyr), nosistema Cu-PCr-Tyr, obtendo-se cristais e um sólido na forma de pó (ambosazuis), respectivamente. Esses compostos foram caracterizados pelas técnicasespectroscópicas de absorção atômica, de absorção na região do infravermelho ena região UV-visível, e ainda, por análises elementar e termogravimétrica. Os resultados indicam que, no sistema Cu(II)-ATP-Tyr, houve formação docomplexo binário Cu-Tyr2, e que a complexação do cátion Cu(II) parece terocorrido pelos grupos carboxilato e amina das duas moléculas de tirosina. Nosistema Cu(II)-PCr-Tyr, os resultados apontam para a formação de um complexoternário, que pode ser representado pela fórmula Cu(II)-Tyr-H2O-PO3H2, no qual ocátion Cu (II) parece ter-se complexado pelos grupos carboxilato e amina datirosina, e ainda, por um grupamento fosfito isolado proveniente da ruptura damolécula de fosfocreatina, além de se coordenar também com uma molécula deágua.

Book Synthesis and Characterization of Some New Copper I Complexes with Multidentate Ligands Containing Phosphorus Arsenic and Nitrogen Donor Atoms

Download or read book Synthesis and Characterization of Some New Copper I Complexes with Multidentate Ligands Containing Phosphorus Arsenic and Nitrogen Donor Atoms written by Johannes Schmidt and published by . This book was released on 1988 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Structure Determination from Powder Diffraction Data

Download or read book Structure Determination from Powder Diffraction Data written by William I. F. David and published by OUP Oxford. This book was released on 2002 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our understanding of the properties of materials, from drugs and proteins to catalysts and ceramics, is almost always based on structural information. This book describes the new developments in the realm of powder diffraction which make it possible for scientists to obtain such information even from polycrystalline materials. Written and edited by experts active in the field, and covering both the fundamental and applied aspects of structure solution from powder diffraction data, this book guides both novices and experienced practitioners alike through the maze of possibilities.