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Book Synthesis Characterization and Reactions of Early Transition Metal Complexes with a Tetraaza macrocyclic Ligand

Download or read book Synthesis Characterization and Reactions of Early Transition Metal Complexes with a Tetraaza macrocyclic Ligand written by Judith A. Ladd and published by . This book was released on 1982 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Structural Characterization of Mono and Dinuclear Transition Metal Complexes Containing the Tetraaza 14 Annulene Ligand

Download or read book Synthesis and Structural Characterization of Mono and Dinuclear Transition Metal Complexes Containing the Tetraaza 14 Annulene Ligand written by Joanna Czuchajowska-Wiesinger and published by . This book was released on 1991 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis Biological Studies of Macrocyclic Transition Metal Complexes

Download or read book Synthesis Biological Studies of Macrocyclic Transition Metal Complexes written by Rayees Sheikh and published by LAP Lambert Academic Publishing. This book was released on 2012-07 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the important facts about the synthesis and biological studies of macrocyclic transition metal complexes. A detailed synthetic discussion of the reaction steps in each mechanism and their relationship with transition metal complexes has been considered. Macrocyclic ligands and their transition metal complexes depends upon the nature of reactants and the corresponding metal ion. The macrocyclic ligand are a growing class of compounds with varying chemistry a wide range of different molecular topologies and set of donor atoms. Aza type ligands appear as very promising to be used as antifertile, antibacterial, antifungal and other biological properties. Macrocyclic metal complexes play a central role in the construction of molecular materials, which display magnetic properties and find applications in material and supramolecular chemistry and biochemistry. It is believed that the present book will provide a succinct and clear introduction to synthesis, characterization and biological studies macrocyclic ligands with transition metal complexes that meets the needs of researchers at a variety of levels in several disciplines.

Book Synthesis Reactivity and Structural Characterization of Transition Metal Complexes Containing Dibenzotetraaza 14 Annulene Macrocyclic Ligands

Download or read book Synthesis Reactivity and Structural Characterization of Transition Metal Complexes Containing Dibenzotetraaza 14 Annulene Macrocyclic Ligands written by Marvin Cecil Weiss and published by . This book was released on 1977 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Direct Synthesis of Metal Complexes

Download or read book Direct Synthesis of Metal Complexes written by B.I. Kharisov and published by Elsevier. This book was released on 2018-04-19 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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

Book Synthesis and Characterisation of Transition Metal Complexes with New Pendant Arm and Bicyclo Macrocyclic Ligands

Download or read book Synthesis and Characterisation of Transition Metal Complexes with New Pendant Arm and Bicyclo Macrocyclic Ligands written by Denis Gérard Fortier and published by . This book was released on 1988 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Structural Studies of Some Metal Complexes of Tetraaza Macrocyclic Ligands

Download or read book Synthesis and Structural Studies of Some Metal Complexes of Tetraaza Macrocyclic Ligands written by Philip John Baillie and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Low coordinate First Row Early Transition Metal Complexes Stabilized by Modified Terphenyl Ligands

Download or read book Low coordinate First Row Early Transition Metal Complexes Stabilized by Modified Terphenyl Ligands written by Jessica Nicole Boynton and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The research in this dissertation is focused on the synthesis, structural, and magnetic characterization of two-coordinate open shell (d1-d4) transition metal complexes. Background information on this field of endeavor is provided in Chapter 1. In Chapter 2 I describe the synthesis and characterization of the mononuclear chromium (II) terphenyl substituted primary amido complexes and a Lewis base adduct. These studies suggest that the two-coordinate chromium complexes have significant spin-orbit coupling effects which lead to moments lower than the spin only value of 4.90 [mu]B owing to the fact that [lambda] (the spin orbit coupling parameter) is positive. The three-coordinated complex 2.3 had a magnetic moment of 3.77 [mu]B. The synthesis and characterization of the first stable two-coordinate vanadium complexes are described in Chapter 3. The values suggest a significant spin orbital angular momentum contribution that leads to a magnetic moment that is lower than their spin only value of 3.87 [mu]B. DFT calculations showed that the major absorptions in their UV-Vis spectra were due to ligand to metal charge transfer transitions. The titanium synthesis and characterization of the bisamido complex along with its three-coordinate titanium(III) precursor are described in Chapter 4. Compound 4.1 was obtained via the stoichiometric reaction of LiN(H)AriPr 6 with the Ti(III) complex TiCl3 *2NMe3 in trimethylamine. The precursor 4.1 has trigonal pyramidal coordination at the titanium atom, with bonding to two amido nitrogens and a chlorine as well as a secondary interaction to a flanking aryl ring of a terphenyl substituent. Compound 4.2 displays a very distorted four-coordinate metal environment in which the titanium atom is bound to two amido nitrogens and to two carbons from a terphenyl aryl ring. This structure is in sharp contrast to the two-coordinate linear structure that was observed in its first row metal (V-Ni) analogs. The synthesis and characterization of mononuclear chromium(II) terphenyl primary substituted thiolate complexes are described in Chapter 5. Reaction of the terphenyl primary thiolate lithium derivatives LiSAriPr4 and LiSArMe6 with CrCl2THF2 in a 2:1 ratio afforded complexes 5.1 and 5.2, which are the very rare examples of chromium(II) thiolates with quasi-two-coordination at the metal center. Both deviate from linearity and have S-Cr-S angles of 111.02(3)° and 107.86(3)° with secondary Cr-C(aryl ring) interactions of ca. 2.115 Å and 1.971 Å respectively. The initial work on titanium and vanadium terphenyl thiolates is described in Appendix I and II. In Chapter 6 I show that the reaction of K2COT (COT= 1,3,5,7-cyclooctatetraene, C8H8) with an aryl chromium(II) halide gave (CrAriPr4)2([mu]2-n3:n4-COT) (6.1) in which a non-planar COT ring is complexed between two CrAriPr4 moieties -- a configuration previously unknown for chromium complexes of COT. OneCr2+ ion is bonded primarily to three COT carbons (Cr--C= 2.22-2.30 Å ) as well as an ipso carbon (Cr-C= ca. 2.47 Å) from a flanking aryl ring of its terphenyl substituent. The other Cr2+ ion bonds to an ipso carbon (Cr-C= ca. 2.53 Å) from its terphenyl substituent as well as four COT carbons (Cr--C= 2.24-2.32 Å). The COT carbon-carbon distances display an alternating pattern, consistent with the non-planarity and non-aromatic character of the ring. The magnetic properties of 6.1 indicate that the Cr2+ ions have a high-spin d4 configuration with S = 2. The temperature dependence of the magnetism indicates that their behavior is due to zero-field splitting of the S = 2 state. Attempts to prepare 6.1 by the direct reaction of quintuple-bonded (CrAriPr4)2 with COT were unsuccessful. (Abstract shortened by UMI.) --Proquest.

Book Transition Metal Complexes with Di pentadienyl Ligands

Download or read book Transition Metal Complexes with Di pentadienyl Ligands written by Weiqing Weng and published by . This book was released on 1991 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Characterization of Helical Ligand Transition Metal Complexes

Download or read book Synthesis and Characterization of Helical Ligand Transition Metal Complexes written by Andrew Fessak and published by . This book was released on 1995 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis Reactivity and NMR Trends of Early Transition Metal Compounds

Download or read book Synthesis Reactivity and NMR Trends of Early Transition Metal Compounds written by Tabitha Marie Cook and published by . This book was released on 2016 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation focuses of three different subjects. The first is the synthesis and characterization of heptacoordinate amidinate compounds. Heptacoordinate compounds are not common, but their structures have been studied. Group 4 amidinate compounds have been used as precursors in the CVD/ ALD processes. Ancillary ligands, such as amidinates, have been used to reduce air-sensitivity of complexes. Reactions of these complexes with water have been used to make metal oxide thin films. In the first study, the complexes Zr[MeC(Ni̳Pr)2]3Cl [zirconium trisamidinate chloride], Hf[MeC(Ni̳Pr)2]3Cl [hafnium trisamidinate chloride], Zr[MeC(Ni̳Pr)2]3Me [zirconium trisamidinate methyl], Hf[MeC(Ni̳Pr)2]3Me [hafnium trisamidinate methyl], Zr[MeC(Ni̳Pr)2]3Et [zirconium trisamidinate ethyl], and Hf[MeC(Ni̳Pr)2]3Me [hafnium trisamidinate methyl] have been synthesized and characterized. The three amidinate ligands bind to the metal centers in a propeller-like fashion. This allows for [lambda] and [delta] enantiomers, which undergo fast exchange in solution. All of these complexes were also found to react with water in air to form Zr[MeC(Ni̳Pr)2]3OH [zirconium trisamidinate hydroxyl] or Hf[MeC(Ni̳Pr)2]3OH [hafnium trisamidinate hydroxyl] complexes. The second portion of the dissertation focuses on the reactions of tungsten alkylidyne complexes with water. When W(≡CSiMe3)(CH2SiMe3)3 [tungsten neosilyl neosilylidyne] is reacted with water at room temperature, a tungsten trimer was formed and characterized via NMR spectroscopies and single-crystal X-ray diffraction. The reaction of a second complex, W(≡Ct̳Bu)(Ot̳Bu)3 [tungsten alkoxide neopentylidyne] with water was studied via NMR and mass spectrometries. While only one complex formed via the NMR-scale reactions, several more were identified using the DART ionizer to react W(≡Ct̳Bu)(Ot̳Bu)3 [tungsten alkoxide neopentylidyne] with water in air before being analyzed via MS. The last subject focuses on the chemical shift trends of d0 [d0] metal complexes. Two trends have been identified and will be discussed in Part 5. The first trend, usually pertaining to hydride and alkyl complexes, is a downfield shift in the peaks of the [alpha] atoms in first- and third-row metals from those of the second-row analogs. The first trend, which usually relates to alkylidene, alkylidyne, oxo, and fluoro complexes, is an upfield shift in the peaks of the [alpha] atoms in first- and third-row metals from those of the second-row analogs.

Book New Transition Metal Complexes

Download or read book New Transition Metal Complexes written by Neil Maxted and published by . This book was released on 2001 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: