Download or read book Spectral and Kinetic Studies of Four coordinate Cobalt II and Nickel II Complexes written by James Dale Navratil and published by . This book was released on 1972 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Relaxation Spectra of Some Nickel ii and Cobalt ii Complexes written by Gordon G. Hammes and published by . This book was released on 1962 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rate constants for the formation and dis sociation of Ni(II) and Co(II) complexes with one, two and three glycine, diglycine, or imida zole molecules were determined by the temperature jump technique. The approximate time scale of the reactions studied ranged from 0.1 to 500 msec. The rate-determining step of the complex building reaction, following initial formation of an ion pair, is the dissociation of a water molecule from the inner hydration sphere of the metal ion. The measured rate constants can be normalized with respect to electrostatic and steric factors by dividing out the calculated ion-pair equilibrium constant. The rate constant of dissociation thus obtained is characteristic of a given metal ion, and, in nearly all the re actions studied, was 20 to 25 times greater for Co(II) than for Ni(II). The difference in acti vation energies corresponding to this rate ratio is of the order of magnitude predicted on the basis of crystal-field theories. For glycine, these normalized rate constants tend to increase in reactions involving the higher complexes, in dicating a loosening of the hydration shell due to the fact that the glycine is bound to the metal via the negatively charged carboxyl group. These rate constants are independent of the number of ligands bound if the bonding takes place via uncharged groups. (Author).

Download or read book Coordination Studies of Cobalt II and Nickel II Complexes of 1 1 3 3 tetramethylurea and 1 1 3 3 tetramethyl 2 Thiourea written by Thomas Morgan King and published by . This book was released on 1966 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Kinetic and Spectral Studies of Cobalt II 4 4 4 4 Tetrasulfophthalocyanine with Sodium Cyanide in Aqueous Solution written by Pablo J. Diaz Cruz and published by . This book was released on 1982 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tertiary Amine Complexes of Cobalt II and Nickel II Trifluoromethanesulfonates written by Michael Thelen Jansky and published by . This book was released on 1978 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrated cobalt(II) and nickel(II) trifluoromethanesulfonates have been prepared by a previously reported procedure, and have been characterized for the first time as [Co(H2O)6] (CF3SO3)2H2O and [Ni(H2O)6] (CF3SO3)2. These formulations are based on analyses, near-infrared spectra, and on measurements of the ligand field electronic spectra and the magnetic susceptibilities. The metal ions are high-spin and octahedrally coordinated in both compounds. Methods have been developed for the preparation of the pure anhydrous cobalt(II) and the previously unknown nickel(II) trifluoromethanesulfonates from the hydrates. By determination of the d-d spectra and the magnetic moments, these are found to contain high-spin octahedrally coordinated metal cations, and therefore contain coordinated trifluoromethanesulfonate anions. The near-infrared spectral absorptions of these anions have been observed. The magnetic moment reported by previous workers for anhydrous cobalt(II) trifluoromethanesulfonate corresponds to the value found in this work for the hydrate. By vacuum line methods, pressure-composition data have been obtained for the triethylamine-cobalt(II) and nickel(II) trifluoromethanesulfonate systems. Breaks in the 25° isothermal phase diagrams show that very unstable adducts containing two molecules of triethylamine per metal ion are formed in each system. These could not be isolated. Various experimental methods for the preparation of quinuclidine complexes were investigated. The one found to be successful involved mixing, by Schlenk techniques, acetonitrile solutions of the anhydrous metal trifluoromethanesulfonate and of an excess of quinuclidine, evaporating the solvent, and removing the excess quinuclidine by sublimation. The solid complexes obtained in this way were characterized as [Co(QUIN)4] (CF3SO3)2 and [Ni(QUIN)2(CF3SO3)2] by their analyses, ligand field spectra, magnetic moments, and the near-infrared absorptions of the anions. As expected, quinuclidine is found to be a better ligand than its more sterically demanding analogue, triethylamine. The quinuclidine complexes of cobalt(II) and nickel(II) trifluoromethanesulfonates are much more stable. In the case of the cobalt complexes, the metal ion has a greater ligation number for quinuclidine than for triethylamine. In these solid salts and complexes, the trifluoromethanesulfonate ion shows a much greater tendency to coordinate than had been expected, based on a previous study using it in aqueous solution.

Download or read book The Solution Behavior and Kinetics of Exchange Reactions of Penta coordinate Complexes of Cobalt II and Nickel II written by Philip Maury Enriquez and published by . This book was released on 1972 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nickel II and Cobalt II Complexes with 2 4 pentanedionate and Tetraamine Ligands written by Jeffrey Moler and published by . This book was released on 1982 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Organometallic Pincer Chemistry written by Gerard van Koten and published by Springer. This book was released on 2012-09-17 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gerard van Koten: The Mono-anionic ECE-Pincer Ligand - a Versatile Privileged Ligand Platform: General Considerations.- Elena Poverenov, David Milstein: Non-Innocent Behavior of PCP and PCN Pincer Ligands of Late Metal Complexes.- Dean M. Roddick: Tuning of PCP Pincer Ligand Electronic and Steric Properties.- Gemma R. Freeman, J. A. Gareth Williams: Metal Complexes of Pincer Ligands: Excited States, Photochemistry, and Luminescence.- Davit Zargarian, Annie Castonguay, Denis M. Spasyuk: ECE-Type Pincer Complexes of Nickel.- Roman Jambor and Libor Dostál: The Chemistry of Pincer Complexes of 13 - 15 Main Group Elements.- Kálmán J. Szabo: Pincer Complexes as Catalysts in Organic Chemistry.- Jun-ichi Ito and Hisao Nishiyama: Optically Active Bis(oxazolinyl)phenyl Metal Complexes as Multi-potent Catalysts.- Anthony St. John, Karen I. Goldberg, and D. Michael Heinekey: Pincer Complexes as Catalysts for Amine Borane Dehydrogenation.- Dmitri Gelman and Ronit Romm: PC(sp3)P Transition Metal Pincer Complexes: Properties and Catalytic Applications.- Jennifer Hawk and Steve Craig: Physical Applications of Pincer Complexes.

Download or read book Coordination Chemistry of Macrocyclic Compounds written by Gordon Melson and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemists have been aware of the existence of coordination compounds con taining organic macrocyclic ligands since the first part of this century ; however, only during the past few years have they expanded research into the chemistry of these compounds. The expansion was initiated in the early 1960s by the synthesis and characterization of compounds containing some new macrocyclic ligands. The synthesis of compounds which may serve as model systems for some natural products containing large rings as ligands provided the main goal for the early expansion of research effort; indeed, a recurrent theme behind much of the reported chemistry has been the analogy between synthetic macrocyclic compounds and many natural-product systems. More recently, the emphases of reported research have ranged over the whole spectrum of chemistry, and the number of publications that discuss macrocyclic chemistry has increased at a dramatic rate. The completed research has been reported in a variety of journals throughout the world but there has been no previous attempt to bring the major developments together under one cover. This book, therefore, attempts to satisfy the need for a single source in which there is both a collection and a correlation of information concerning the coordination chemistry of macrocyclic compounds. The chapters in this book discuss various aspects of macrocyclic chemistry, and while these chapters as a whole constitute an in-depth survey of the state-of the-art of the field, each chapter is written as a complete unit.

Download or read book Spectral and Kinetic Studies of Some Octahedral Cobalt III Complexes written by 李子健 and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1986 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of Some Nickel II and Cobalt II Coordination Complexes with Acetanilides written by Robert Wayne Gray and published by . This book was released on 1968 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Master s Theses and Doctoral Dissertations in the Pure and Applied Sciences written by and published by . This book was released on 1973 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structural and Biological Applications of Schiff Base Metal Complexes written by Pallavi Jain and published by CRC Press. This book was released on 2023-05-31 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coordination compounds have been well-known for their wide variety of applications for over a century, as well as enhancing the researcher’s interest and concern in evaluating their action mechanism. It is certainly one of the most intensely discussed research topics. Coordination compounds involve different metal-ion-ligand phenomenon. The involved metal ions play a significant role in structural association and functioning of several processes in the genetic and metabolism system. In recent years, Schiff base ligands have gained significant interest and received a keen interest of many researchers. Schiff’s base ligands have been recognized to hold a wide variety of biological and medicinal activities due to the presence of donor atoms. They have proved exceptional pharmalogical actions such as antimicrobial, anti-tuberclosis, antiplatelet, antidiabetic, antiarthritis, antioxidant, anti-inflammatory, anticancer, antiviral, antimalarial, and analgesic. These biologically active Schiff base ligands have also been shown to inhibit enzyme mobilization and, when bound to a metal ion, exhibit enhanced biological activity, making them useful in a number of fields. As a result, metal complexes of Schiff base ligands are gaining popularity due to their unique properties and functionalities. Schiff base complex-based research for educational and industrial purposes is booming, and the number of publications is gradually increasing. Despite these interests, there is currently no detailed book on Schiff base metal complexes that covers the structures, biological activities, and other non-biological perspectives. This book delves into the structures of Schiff base metal complexes, which are critical in assessing the biological viability of any complex. It also highlights their biological significance in pharma and drug discovery like antibacterial, antifungal, anticancer, anti-inflammatory, anti-arthritis, anti-diabetic, antioxidants, anti-proliferative, antitumor, anticancer, antiviral. The fundamentals of metal complexes are described, as well as an up-to-date outline of developments in synthesis, characterization methods, properties- chemical, thermal, optical, structural, and applications. This book also discusses the other applications of Schiff base metal complexes: as sensor (luminescent, electrochemical, and biosensor), as pigments in dying and paint industries, as photocatalyst to improve the degradation rate. Features : This book would be useful for academia, researchers and engineers working in the area of Schiff base and their metal complexes. This book will give an in-depth account of the properties of Schiff base and their metal complexes. This book will discuss the details of synthesis methods for Schiff base and their metal complexes. This book will cover emerging trends in the use of Schiff base metal complexes in the industry. This book will provide an overview of the wider biological applications of Schiff base metal complexes

Download or read book Magnetic Spectral and Structural Studies of Some High spin Cobalt II Complexes written by Roger Hamilton Soderberg and published by . This book was released on 1963 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nickel II and Cobalt II Complexes of Amides and Diamides written by William Kent Cunningham and published by . This book was released on 1967 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ligand Exchange and Substitution on Five coordinate Complexes of Copper II Nickel II and Cobalt II written by Bruce Germein Doddridge and published by . This book was released on 1986 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: