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Book Synthesis and Reactivity of Low Coordinate Low Valent Titanium and Tungsten Complexes Containing t Bu 3 SiO Silox

Download or read book Synthesis and Reactivity of Low Coordinate Low Valent Titanium and Tungsten Complexes Containing t Bu 3 SiO Silox written by Ana-Rita Mayol and published by . This book was released on 1999 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: The preparation of W(III), [(silox)2WCl(CO)]2, 30, and W(IV), [(silox)2W(CO)]2, 31, bimetallic complexes was accomplished. Structural studies and Extended Huckel calculations were performed on 31 to gain a better understanding of the bonding in the molecule. Thermolysis or photolysis of 30 yield a mixed valence bimetallic [(silox)3W = W(silox)(CO) 2], 32.

Book Synthesis and Reactivity of Low valent Titanium and Zirconium Complexes

Download or read book Synthesis and Reactivity of Low valent Titanium and Zirconium Complexes written by Tamara Elizabeth Hanna and published by . This book was released on 2007 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Reactivity of Early Transition Metal Complexes

Download or read book Synthesis and Reactivity of Early Transition Metal Complexes written by LeGrande Mancel Slaughter (III) and published by . This book was released on 2000 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis of Low coordinate Group VI Transition Metal Siloxide Complexes and Structural Comparison of Four coordinate Molybdenum and Tungsten Siloxide Complexes Evidence for Greater Relativistic Effects in Third Row Versus Second Row

Download or read book Synthesis of Low coordinate Group VI Transition Metal Siloxide Complexes and Structural Comparison of Four coordinate Molybdenum and Tungsten Siloxide Complexes Evidence for Greater Relativistic Effects in Third Row Versus Second Row written by David Seth Kuiper and published by . This book was released on 2008 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: Attempts to access a (tBu3SiO)2MoNR(Ar) species through the use of dinuclear molybdenum starting materials were not successful. While NH bond activation pathways were envisioned as a necessary component in the synthesis of such a species, the steric bulk of [(tBu3SiO)2MoCl]2 rendered metathesis with bulky amines useless and the decomposition of [(tBu 3SiNH)2MoCl]2 led to a non-isolable product which was prone to further decomposition.

Book Synthesis and Reactivity of Titanium and Tungsten Diolate Complexes

Download or read book Synthesis and Reactivity of Titanium and Tungsten Diolate Complexes written by Denise L. Barnes and published by . This book was released on 1993 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Characterization of Low valent Titanium Complexes

Download or read book Synthesis and Characterization of Low valent Titanium Complexes written by Ludmila Scoles and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemistry of low-valent titanium is poorly developed apart from ubuquitous cyclopentadienyl derivatives.

Book Part I Synthesis Characterization and Reactivity of Low Valent Organotitanium Complexes Part II Chemical Vapor Deposition of Rhodium Metal Thin Films

Download or read book Part I Synthesis Characterization and Reactivity of Low Valent Organotitanium Complexes Part II Chemical Vapor Deposition of Rhodium Metal Thin Films written by Yujian You and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Titanium(II) complex CpTiCl(dmpe)$sb2$ is prepared by reducing (CpTiCl$sb2)sb{rm x}$ with n-butyllithium in the presence of 1,2-bis(dimethylphosphino)ethane (dmpe). Subsequent treatment with methyllithium or n-butyllithium affords CpTiMe(dmpe)$sb2$ and CpTiH(dmpe)$sb2$, respectively. The crystal structures of CpTiX(dmpe)$sb2$ (X = Cl, Me, H) show unusually long metal ligand distances. Analogous treatment of (Cp$sp*$Ti(BH$sb4$)Cl) $sb2$ with n-butyllithium affords Cp$sp*$Ti(BH$sb4$)(PP), where PP is dmpe or (t-butyl)tris(dimethylphosphino-methyl)silane. All of these titanium(II) complexes catalyze oligomerization of ethylene to 1-butene, 2-ethyl-1-butene, and 3-methyl-1-pentene, probably via metallacyclopentane intermediates. Oxidations of the neutral titanium(II) complexes with 1,1$spprime$-dimethylferrocinium salts afford the first examples of cationic alkyltitanium(III) complexes: (CpTiX(dmpe)$sb2rbrack$ BAr$sb4,$ where Ar = Ph or 3,5-(CF$sb3)sb2$C$sb6$H$sb3$ (FPB). Two other complexes, (TiMe$rm sb2(dmpe)sb2rbrack$ FPB and (Cp$sp*$Ti(BH$sb4$)(dmpe)) FPB, have been prepared by oxidation of the corresponding titanium(II) species. Crystallographic studies of (CpTiH(dmpe)$sb2$) FPB, (TiMe$sb2$(dmpe)$sb2$) FPB, and (Cp$sp*$Ti(BH$sb4$)(dmpe)) FPB reveal that the titanium(III) cations show a lengthening of the Ti-P bond distances owing to a decrease in metal-ligand $pi$-back-bonding. The cationic titanium(III) alkyls neither oligomerize nor polymerize ethylene. Treatment of Rh(hfac)(CH$sb2$=CH$sb2)sb2$ (hfac = hexafluoroacetylacetonate) with vinyl-trimethylsilane, 1,2-bis(trimethylsilyl)acetylene, Cu(hfac)(COT), or PMe$sb3$ affords a series of new complexes. High purity rhodium films have been deposited at 200-300 $spcirc$C using Rh(hfac)(CH$sb2$ = CH$sb2)sb2$ as a CVD precursor. The deposition occurs via the disproportionation reaction 3 Rh(hfac)(alkene)$sb2$ $longrightarrow$ 2 Rh + Rh(hfac)$sb3$ + 6 alkene. Ultra high vacuum studies show that Rh(hfac)(CH$sb2$ = CH$sb2)sb2$ adsorbs molecularly on copper surfaces up to 130 K. The hfac groups are oriented perpendicular to the surface at 220 K. Reduction of rhodium(I) occurs at approximately 300 K. Decomposition of surface-bound hfac groups occurs at higher temperatures. This process does not occur under CVD conditions owing to the higher coverages characteristic of this process, which favor bimolecular reactions that lead to the assembly of the observed Rh(hfac)$sb3$ product.

Book Low valent Synthons of Titanium

Download or read book Low valent Synthons of Titanium written by Josué Rolando Aguilar Calderón and published by . This book was released on 2019 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Orbital Interactions in Chemistry

Download or read book Orbital Interactions in Chemistry written by Thomas A. Albright and published by John Wiley & Sons. This book was released on 2013-04-08 with total page 853 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explains the underlying structure that unites all disciplinesin chemistry Now in its second edition, this book explores organic,organometallic, inorganic, solid state, and materials chemistry,demonstrating how common molecular orbital situations arisethroughout the whole chemical spectrum. The authors explore therelationships that enable readers to grasp the theory thatunderlies and connects traditional fields of study withinchemistry, thereby providing a conceptual framework with which tothink about chemical structure and reactivity problems. Orbital Interactions in Chemistry begins by developingmodels and reviewing molecular orbital theory. Next, the bookexplores orbitals in the organic-main group as well as in solids.Lastly, the book examines orbital interaction patterns that occurin inorganic-organometallic fields as well as clusterchemistry, surface chemistry, and magnetism in solids. This Second Edition has been thoroughly revised andupdated with new discoveries and computational tools since thepublication of the first edition more than twenty-five years ago.Among the new content, readers will find: * Two new chapters dedicated to surface science and magneticproperties * Additional examples of quantum calculations, focusing oninorganic and organometallic chemistry * Expanded treatment of group theory * New results from photoelectron spectroscopy Each section ends with a set of problems, enabling readers totest their grasp of new concepts as they progress through the text.Solutions are available on the book's ftp site. Orbital Interactions in Chemistry is written for bothresearchers and students in organic, inorganic, solid state,materials, and computational chemistry. All readers will discoverthe underlying structure that unites all disciplines inchemistry.

Book Activation of Small Molecules

Download or read book Activation of Small Molecules written by William B. Tolman and published by John Wiley & Sons. This book was released on 2006-12-13 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first to combine both the bioinorganic and the organometallic view, this handbook provides all the necessary knowledge in one convenient volume. Alongside a look at CO2 and N2 reduction, the authors discuss O2, NO and N2O binding and reduction, activation of H2 and the oxidation catalysis of O2. Edited by the highly renowned William Tolman, who has won several awards for his research in the field.

Book NMR of Paramagnetic Molecules

Download or read book NMR of Paramagnetic Molecules written by G. N. La Mar and published by Elsevier. This book was released on 2013-10-22 with total page 695 pages. Available in PDF, EPUB and Kindle. Book excerpt: NMR of Paramagnetic Molecules: Principles and Applications is a compendium of papers that discusses the physical principles behind the technique of nuclear magnetic resonance, as well as, evaluates the scope and limitation of the applications of NMR in chemistry and biology. These papers emphasize the applications of the technique in chemistry and biochemistry where it widely used, particularlyon NMR experiments in the liquid state. Some papers describe the theoretical factors governing the resonance position and linewidth, and then also interpret magnetic resonance parameters in terms of electronic structure. Another paper investigates the gap between the mathematical complexities of earlier experiments and the operational aspects of chemical information from the spectra. Examples show studies in biochemical molecules and process in events where contact interactions are present either as a result of intrinsic molecular paramagnetism or are just induced through the addition of suitable paramagnetic probes. One paper presents the definitive and controversial results involving stereochemistry and deuterium NMR. This collection of papers will prove useful for nuclear physicists, researchers, and academicians in the field of nuclear physics.

Book Multiple Bonds between Metal Atoms

Download or read book Multiple Bonds between Metal Atoms written by F. Albert Cotton and published by Springer Science & Business Media. This book was released on 2005-06-28 with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides historical perspective as well as current data Abundantly illustrated with figures redrawn from literature data Covers all pertinent theory and physical chemistry Catalytic and chemotherapeutic applications are included

Book Comprehensive Coordination Chemistry II

Download or read book Comprehensive Coordination Chemistry II written by J. A. McCleverty and published by Newnes. This book was released on 2003-12-03 with total page 11845 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive Coordination Chemistry II (CCC II) is the sequel to what has become a classic in the field, Comprehensive Coordination Chemistry, published in 1987. CCC II builds on the first and surveys new developments authoritatively in over 200 newly comissioned chapters, with an emphasis on current trends in biology, materials science and other areas of contemporary scientific interest.