Download or read book The Synthesis Molecular Structure and Magnetic Properties of Some Binuclear Transition Metal Complexes with Exogenous Bridging Ligands written by Estelle Quijano and published by . This book was released on 1990 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Photophysical Properties of Binuclear Transition Metal Compounds written by Charles Allen Daws and published by . This book was released on 1993 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Magnetic Properties of Some Mononuclear Binuclear and Mixed metal Binuclear Transition Metal II Complexes written by Raymond L. Hough and published by . This book was released on 1973 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Master s Theses in the Natural and Technical Sciences written by and published by . This book was released on 1990 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Faculties Publications and Doctoral Theses in Chemistry and Chemical Engineering at United States Universities written by American Chemical Society. Committee on Professional Training and published by . This book was released on 1991 with total page 1646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural and Reactivity Studies on Binuclear Metal Complexes written by Raymond Stanley Dickson and published by . This book was released on 1984 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the synthesis and characterization of some diphosphine-bridged, binuclear rhodium complexes which contain bridging acetylene ligands, and some chemistry of these complexes with selected small molecules. The X-ray crystal structure of an unusual ironpalladium-bonded heterobinuclear complex is also reported. The complexes [Rh2x2([Mu]-RCCR)(DPM)2] (I: X = Cl, R = CF3; 2: X = I, R = CF3; 3: X = Cl, R = C02CH3; DPM = bis(diphenylphosphino)methane) were synthesized by the reaction of [RhCl(C8H12)]2 and two equivalents of DPM with the appropriate activated acetylene, CF3C2CF3(hexa-fluoro2-butyne, HFB) or CH3O(O)CC2C(O)OCH3(dimethylacetylenedicarboxylate, DMA), followed by halide metathesis of 1 with KI to obtain 2. The crystal structure of [Rh2Cl2([Mu]-HFB)(DPM)2] (1) was determined to establish the mode of acetylene binding in this complex (space group P43, a = 21.283(1) A, c = 14.255(1) A, z = 4; 5243 unique reflections; R = 0.040, Rw = 0.055). The complex was shown to be a distorted "A-frame" complex, having a metal-metal bond (Rh(1)-Rh(2) = 2.7447(9) A), two terminal chloride ligands and a bridging acetylene moiety coordinated parallel to the metal-metal axis, as a so-called cisdimetallated olefin. Most parameters of this group suggested sp2 hybridization of the central two carbon atoms. The reactions of compouns 1, 2 and 3 with CO and SO2 were reversible and gave products in which these small molecules had inserted into the Rh-Rh bonds. Protonation by the strong acids CF3SO3H and HBF4•(C2H5)2o also occurred reversibly at the metal-metal bonds and was most probably accompanied by anion coordination at one metal centre. However, methyl isocyanide (CNMe) reacted quite differently, yielding complexes in which the isocyanide ligands are bound terminally. Although all of compounds 1 - 3 reacted with CNMe in a rather analogous manner there were some subtle differences observed. Stepwise addition of CNMe to compound 1 yielded two unsymmetrical, isomeric 1:1 adducts, [Rh2Cl2 (CNMe) (Mu-HFB ) (DPM)2], followed by a 2:1 adduct, [Rh2Cl(CNMe)2(Mu-HFB)(DPM)2] [Cl] , and finally by a 4:1 adduct [Rh(CNMe)4(Mu-HFB)(DPM)2][Cl]2. The iodo analogue species 2 gave analogous products except that the isomer ratio of the 1:1 adduct differed and a second symmetric 2:1 adduct, [Rh2I2(CNMe)2(Mu-HFB)(DPM)2], was also observed. With the DMA-bridged species 3 only one 1:1 adduct was observed and all other products were analogous to the reactions of compound 1. The unsymmetrical 2:1 adduct of compound 1 was isolated as the BF4- salt, [Rh2Cl(CNMe)2(Mu-HFB)-(DPM)2][BF4]. Its X-ray crystal structure determination (space group P21/n, a = 16.366(3) A, b = 18.685(3) A, c = 20.425(4) A, [Beta] = 104.35(1)°, Z = 4; 6800 unique observations; R = 0.059, Rw = 0.097) showed that the metalmetal bonded complex retained the cis-dimetallated olefinic binding mode of the acetylene group; one metal had a terminal chloro ligand whereas the other had two terminal CNMe groups. [(PPh3)PdFe(SC5H4)2] was prepared and crystallized as the hemitoluene solvate by Mr. T.G. Rucker, Dr. B.W. Hames and Dr. Dietmar Seyferth at M.I.T., via the reaction of Pd(PPh3)4 with Fe(C5H4)2S3. The X-ray crystal structure (space group C2/c, a = 39.258(5) A, b = 10.548(2) A, c = 13.612(4) A, [Beta] = 101.69(2)°, Z = 8; 3255 unique observed reflections; R = 0.040, Rw = 0.046) showed that the compound had an unusual iron-palladium dative-bonded structure (Fe[right arrow]Pd = 2.878(1) A) with the palladium chelated at trans positions by the two cyclopentadienethiolato sulfurs. The triphenylphosphine ligand is attached to the palladium trans to the metal-metal bond. The tilt angle found between the two cyclopentadienthiolate rings was only 19.6°, about half of those observed for other Cp2MLn compounds.
Download or read book Magnetostructural Correlations in Polynuclear Complexes of Phtalazine Based Tetra and Hexadentate Ligands written by Christopher Lorenzo Sheppard and published by . This book was released on 1998 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Structural and Magnetic Properties of First and Second Row Transition Metals with N N N and S N S Pincer type Ligands written by Sarah Ouanounou and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metal Complexes and Metals in Macromolecules written by Dieter Wöhrle and published by Wiley-VCH. This book was released on 2003-07-09 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metals and metal complexes can form compounds with organic macromolecules that show amazing properties. As is so often the case, nature leads by example. Synthetically produced model compounds, such as phthalocyanines, porphyrines or metalloproteins, as well as metallorganic polymers have aroused much interest in materials science. Their special magnetic, electrochemical and photochemical properties open up new perspectives in microelectronics and sensors. This compact manual is aimed at all organic, inorganic, polymer and physical chemists as well as materials scientists looking for competent and detailed information on the current state of this interdisciplinary area of research. It covers all questions relating to the targeted design of metallic macromolecules, from proven synthesis methods right up to the latest strategies. It also treats major progress in the determination of their structures, the physical-chemical properties of promising compounds and their potential in microelectronics and sensors. Furthermore, the most important methods of synthesis and investigation are presented in detail in an experimental section, while a comprehensive collection of pertinent original literature round s off this unique reference on all matters relating to macromolecular metal complexes.
Download or read book Synthesis and Characterization of Binuclear and Transition Metal Complexes Incorporating the Tridentate Chelating Ligand Dimethyl N N dimethylethanolamino 1 pyrazolyl gallate written by and published by . This book was released on 1977 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Structures and Characterization of Coordination Compounds with the Transition Metals Ni II Cu II Mn II Cr III Fe III Using Ligands Based on Iminodiacetic Acid and N heterocycles written by Maria Paula Juanico and published by Cuvillier Verlag. This book was released on 2003 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Reactions of Dinuclear Transition Metal Complexes Containing Bridging Ligands Relevant to Heterogeneous Catalysis written by Eric Niels Jacobsen and published by . This book was released on 1986 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Electronic Structures of Transition Metal Complexes II written by David Michael P. Mingos and published by Springer Science & Business Media. This book was released on 2012-01-11 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews current and future trends in modern chemical research, focusing on chemical structure and bonding. Covers development of electronic structure theories for transition metal complexes, orbital models and electronic structure theory and more.
Download or read book Metal Ligand Bonding written by E A Moore and published by Royal Society of Chemistry. This book was released on 2019-05-02 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: To appreciate the chemistry and physical properties of complexes of the transition series, an understanding of metal-ligand interactions applied to complexes of the d-block is needed. Metal Ligand Bonding aims to provide this through an accessible, detailed, non-mathematical approach. Initial chapters detail the crystal-field model, using it to describe the use of magnetic measurements to distinguish complexes with different electronic configurations and geometries. Subsequent chapters look at the molecular orbital theory of transition metal complexes using a pictorial approach. Bonding in octahedral complexes is explored and electronic spectra and magnetic properties are given extensive coverage. The material addressed in this book forms the foundation of undergraduate lecture courses on d-block chemistry and facilitates learning through various key features, including: full colour diagrams; in-text questions with answers; revision exercises and clearly defined learning outcomes to encourage a reflective approach to study; an associated website; and experimental data and observations from everyday life. A basic knowledge of atomic and molecular orbitals as applied to main group elements is assumed.
Download or read book Molecular Structures and Physicochemical Properties of Some Chiral and Helical Transition Metal Complexes with Polypyridines and Tetradentate Anionic Ligands written by 何國強 and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Molecular Structures and Physicochemical Properties of Some Chiral and Helical Transition Metal Complexes With Polypyridines and Tetradentate Anionic Ligands" by 何國強, Kwok-keung, Paul, Ho, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3123488 Subjects: Transition metal compounds Complex compounds Ligands
Download or read book The Structures and Properties of Some Mononuclear and Binuclear Transition Metal Schiff Base Complexes written by Derek Peter Freyberg and published by . This book was released on 1977 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transition Metals in Biochemistry written by A. S. Brill and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transition metal ions in biological systems are of interest in biology, biochemistry, chemistry, medicine, and physics. Scien tists with rather different viewpoints, employing many methods, have contributed to this area. A concise review of the current state of the field will, to some extent, reflect the special knowledge of the person writing it - in this case application of physical methods to the investigation of metal coordination. x ray diffraction is one of the most important of these methods, but a useful treatment of X-ray structure analysis would be com parable in size with and beyond the scope of the monograph. Many results of X-ray diffraction studies are, of course, presented. Electron paramagnetic resonance spectroscopy has played a major part in the rapid advance in knowledge of the electronic struc tures of transition metal ions in biological systems. More gener ally, measurements involving light, microwaves, and magnetic fields are capable of producing much new information, and the required instrumentation is available at most research institu tions. Therefore light absorption and paramagnetic resonance are treated in depth. The principles described in the latter discus sions are broadly applicable, for example to the promising tech niques of X-ray spectroscopy (utilizing synchrotron radiation) and lanthanide-perturbed, very high-resolution nuclear magnetic resonance spectroscopy.
