Download or read book Magnetic Resonance Studies of Low spin D superscript 5 Transition Metal Complexes written by Richard Edward DeSimone and published by . This book was released on 1970 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Magnetic Resonance Studies of Transition Metal Complexes written by Karl-Erik Falk and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Magnetic Resonance Studies on Some Transition Metal Complexes written by M. N. S. Hill and published by . This book was released on 1969 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Magnetic Resonance Studies of Paramagnetic Transition Metal Complexes written by Vijay Kumar Kapur and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Magnetic Resonance Studies of Transition Metal Complexes written by Michael Andrew Freeman and published by . This book was released on 1980 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Magnetic Resonance Studies of Transition Metal selenocyanate Complexes written by Lori L. Wolf and published by . This book was released on 1985 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Characterization of Low Coordinate Transition Metal Complexes written by Aimee M. Bryan and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation describes the synthesis, characterization, and reactivity studies of new low-coordinate complexes of readily available and inexpensive transition metals such as iron, cobalt and nickel. The compounds were magnetically characterized in detail and tested for single molecule magnet (SMM) behavior. SMMs are a topic of intense research because of their potential applications in magnetic memory, high-density information storage and quantum computing technologies. Low-coordinate compounds display magnetic moments that indicate high orbital angular momentum and are very promising candidates for SMM behavior because they also tend to have large negative zero-field splitting (D) values. The complexes reported here are stabilized by using a variety of amido, aryloxo and thiolato ligands with bulky terphenyl groups and also using aryl and alkyl substituted silylamides. A superconducting quantum interference device (SQUID) and Evans' methods were used to study the magnetic properties and single crystal X-ray crystallography and NMR (1H and 13C) were used to confirm the structures of these compounds in both the solid and solution states. Further characterization studies included UV-visible, near-IR, and IR spectroscopy, melting point, elemental analysis and DFT calculations, where applicable, in order to determine the electronic configurations and bonding schemes. At present there are ca. 100 stable open shell two-coordinate mononuclear transition metal complexes currently known but ca. 20% have a linear coordination at the metal atom with only a few being strictly 180° at their metal center. Very few of these compounds had been magnetically characterized. In Chapter 2, the synthesis and magnetic characterization of the late transition metal Co2+ (d7) and Ni2+ (d8) primary amido complexes Co{N(H)Ar(iPr6)}2, Co{N(H)Ar(Me6)}2, Ni{N(H)Ar(iPr6)}2 and Ni{N(H)Ar(Me6)}2 (Ar(Me6) = C6H3-2,6(C6H2-2,4,6-Me3)2, Ar(iPr6) = C6H3-2,6(C6H2-2,4,6-(i)Pr3)2) are described. The investigations showed that they exhibit interesting magnetic behavior. The bent versus linear geometries of the complexes enable direct observation of the effects of orbital angular momentum quenching upon bending the metal coordination geometry. The electronic configuration of the linear cobalt(II) complexes does not predict first order orbital angular momentum and yet, the magnetic moment of Co{N(H)Ar(iPr6))2 is much higher than the spin only value which suggests a large spin-orbit coupling effects due to mixing of the ground and excited states. In Chapter 3, the synthesis and characterization of the mononuclear chromium, iron, cobalt and nickel terphenyl substituted thiolate complexes Cr(SAr(Me6))2, Cr(SAr(iPr4))2, Fe(SAr(iPr4))2, Co(SAr(iPr4))2 and Ni(SAr(iPr4))2 are described. Their structures show bent coordination geometries of varying degree with strong secondary M-[eta]6 and M-C(ipso) flanking aryl ring interactions of ca. 2.153 [Angstrom] for Fe(SAr(iPr4))2, ca. 1.625 [Angstrom] for Co(SAr(iPr4))2 and ca. 1.731 [Angstrom] for Ni(SAr(iPr4))2. This observation is in sharp contrast to the almost linear coordination observed for the derivatives of the related but more crowded terphenyl thiolate ligand, SAr(iPr6), in M(SAr(iPr6))2 complexes where M = Cr, Fe, Co and Ni and the strictly linear geometry observed for the terphenyloxo analogs M(OAr(iPr4))2 where M = Fe and Co. Magnetic moments for these species are, in general, lower than the spin-only values. Expect for chromium, this is an unexpected observation for late transition metal low-coordinate complexes. The suppression of magnetic moments is most like due to the strong M-arene interactions which effectively increases the coordination number at the metal atom. These results demonstrate the important role that substituents play on the flanking rings of the terphenyl ligands and begs further investigations involving the role of dispersion in the isolation of low coordination mononuclear transition metal complexes. The divalent silylamides M{N(SiMe3)2}2 (M = Mn, Fe, and Co) are key synthons for low-coordinate transition-metal derivatives. In Chapter 4, the previously reported, but incorrectly characterized cobalt(II) silylamide, [Co{N(SiMe3)2}2]2 has been spectroscopically and magnetically characterized for the first time. In addition, the new Lewis base complexes [Co{N(SiMe3)2}2(PMe3)], and [Co{N(SiMe3)2}2(THF)], as well as a previously reported complex [Co{N(SiMe3)2}2(py)] were isolated and characterized. Magnetic studies showed that they had considerably larger magnetic moments than the spin-only value of 3.87 [mu](B), which is indicative of a significant zero-field splitting and g-tensor anisotropy. In addition to their interesting magnetic behavior and unexpectedly large D values in the range of -20 to -80 cm−1. The electronic spectrum of [Co{N(SiMe3)2}2]2 in solution showed that earlier characterization spectra of "Co{N(SiMe3)2}2" match that of the bright green THF adduct and not the dark brown cobalt dimer [Co{N(SiMe3)2}2]2. In Chapter 5, it is shown that the reaction of the versatile cobalt(II) amide, [Co{N(SiMe3)2}2]2, with four equivalents of the sterically crowded terphenyl phenols, HOAr(Me6) and HOAr(iPr4) (Ar(iPr4) = C6H3-2,6(C6H3-2,6-(i)Pr2)2) produced the first well-characterized, monomeric two-coordinate cobalt(II) bisaryloxides, Co{OAr(Me6))2 and Co(OAr(iPr4))2. Not only are these very rare examples of two-coordinate transition metal(II) aryloxides, but the magnetic moments of both the linear and the bent species were well in excess of the spin only value for cobalt(II) ion. It was demonstrated that careful manipulation of the synthetic conditions for Co(OAr(iPr4))2 could produce varying occupancies of the cobalt(II) site and that after weighting the magnetic susceptibilities of the compounds accordingly, the moments were shown to be in close agreement with each other. Chapter 6 reports the synthesis of the unstable nickel(II) bis(silylamide) complex Ni{N(SiMe3)2}2 via the reaction of NiI2 and two equivalents of NaN(SiMe3)2 in tetrahydrofuran, as well as two of its Lewis base adducts, Ni{N(SiMe3)2}2(THF) and Ni{N(SiMe3)2}2(py)2. The reaction of two equivalents of LiN(SiMe3)2 with NiCl2(DME) in tetrahydrofuran afforded the reduced homoleptic tetrameric nickel(I) amide complex, [Ni{N(SiMe3)2}]4. This unique polymetallic structure having a Ni4N4 planar array has four S = 1/2 nickel (I) ions and an antiferromagnetic exchange coupling constant of J = -102(2) cm−1. This study provides strong evidence that the formation of nickel(II) and nickel(I) amido complexes is possible without the use of sterically demanding ligand sets.

Download or read book Nuclear Magnetic Resonance Studies of Paramagnetic Transition Metal Complexes written by Kee-Lam Chua and published by . This book was released on 1973 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Magnetic Resonance Studies of Paramagnetic Transition Metal Ion Complexes written by William Daniel Perry and published by . This book was released on 1970 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Magnetic Resonance Investigations of the Structures and Reactivities of Some Transition Metal Complexes Part One Magnetic Resonance Studies of Some Cobalt ii Complexes Part Two Esr Analysis of Dioxygen Adducts of Cobalt ii Complexes Part Three Catalytic Oxidation of Organic Reactions written by and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 77Se Nuclear Magnetic Resonance Studies Properties of Diselenocarbamato Transition Metal Complexes and Some Selenobiochemicals written by Wie-Hin Pan and published by . This book was released on 1979 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stereochemistry of Transition Metal Complexes written by Donald Howard Williams and published by . This book was released on 1964 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Synthesis and Dynamic Nuclear Magnetic Resonance Studies of Fluxional Transition Metal Complexes of Pyridyl Based Ligands written by Matthew Daniel Olsen and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1971 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transactions of the Faraday Society written by Faraday Society and published by . This book was released on 1960 with total page 998 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1967 with total page 866 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metals in Medicine written by James C. Dabrowiak and published by John Wiley & Sons. This book was released on 2017-05-02 with total page 751 pages. Available in PDF, EPUB and Kindle. Book excerpt: Working from basic chemical principles, Metals in Medicine, 2nd Edition describes a wide range of metal-based agents for treating and diagnosing disease. Thoroughly revised and restructured to reflect significant research activity and advances, this new edition contains extensive updates and new pedagogical features while retaining the popular feature boxes and end-of-chapter problems of the first edition. Topics include: Metallo-Drugs and their action Platinum drugs for treating cancer Anticancer agents beyond cisplatin including ruthenium, gold, titanium and gallium Responsive Metal Complexes Treating arthritis and diabetes with metal complexes Metal complexes for killing bacteria, parasites and viruses Metal ion imbalance and its links to diseases including Alzheimer's, Wilson's and Menkes disease Metal complexes for detecting disease Nanotechnology in medicine Now in full colour, Metals in Medicine, 2nd Edition employs real-life applications and chapter-end summaries alongside feature boxes and problems. It provides a complete and methodical examination of the use of metal complexes in medicine for advanced undergraduate and postgraduate students in medicinal inorganic chemistry, bioinorganic chemistry, biochemistry, pharmacology, biophysics, biology and bioengineering. It is also an invaluable resource for academic researchers and industrial scientists in inorganic chemistry, medicinal chemistry and drug development.