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Book Synthesis Characterization and Reactivity of Technetium and Rhenium Complexes in Intermediate Oxidation States

Download or read book Synthesis Characterization and Reactivity of Technetium and Rhenium Complexes in Intermediate Oxidation States written by Harvey Stewart Trop and published by . This book was released on 1979 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis Structure and Reactivity of Rhenium V Complexes of Chelating Triphosphines

Download or read book Synthesis Structure and Reactivity of Rhenium V Complexes of Chelating Triphosphines written by Youhyuk Kim and published by . This book was released on 1990 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis Characterization and Reactivity Studies of Hexanuclear Rhenium Cluster Complexes with Oxygen and Sulfur Donor Ligands

Download or read book Synthesis Characterization and Reactivity Studies of Hexanuclear Rhenium Cluster Complexes with Oxygen and Sulfur Donor Ligands written by Julia A. Edwards and published by . This book was released on 2008 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis Reactivity and Structural Studies of Rhodium III and Rhodium II Complexes of Novel Bis oxazoline Pincer Ligands

Download or read book Synthesis Reactivity and Structural Studies of Rhodium III and Rhodium II Complexes of Novel Bis oxazoline Pincer Ligands written by Jennifer Krumper and published by . This book was released on 2003 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis Structure and Reactivity of Rhenium Phosphine Complexes and Polyalkynyl Rhenium rhenium and Rhenium iron Complexes

Download or read book Synthesis Structure and Reactivity of Rhenium Phosphine Complexes and Polyalkynyl Rhenium rhenium and Rhenium iron Complexes written by Wayne E. Meyer and published by . This book was released on 1999 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis Characterization and Reactivity of Rhenium I Tris acetylene and Oxo Bis acetylene Complexes Oxygen Atom Transfer Reactions of Rhenium Triazacyclononane Compounds

Download or read book Synthesis Characterization and Reactivity of Rhenium I Tris acetylene and Oxo Bis acetylene Complexes Oxygen Atom Transfer Reactions of Rhenium Triazacyclononane Compounds written by Rebecca Renae Conry and published by . This book was released on 1991 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis Characterization and Reactivity of Organometallic Complexes of Uranium and Plutonium in the 2 and 3 Oxidation States

Download or read book Synthesis Characterization and Reactivity of Organometallic Complexes of Uranium and Plutonium in the 2 and 3 Oxidation States written by Cory J. Windorff and published by . This book was released on 2017 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation focuses on the synthesis, characterization, and reactivity of unique organometallic complexes of uranium, plutonium, and the lanthanides in efforts to expand the limits of known redox chemistry of these elements. The results in this dissertation extend investigations of previously established reduction reactions involving these metal ions to extend them to more challenging systems. These reactions utilized the tri(cyclopentadienide) coordination environment examining the differences in the substitution pattern on the cyclopentadienide rings, particularly the Cp'' ligand [Cp'' = C5H3(SiMe3)--1,3]. In the course of these studies, the +2 oxidation state for plutonium was confirmed, and the most stable form of UII to date was isolated. To accomplish the plutonium chemistry, several surrogate syntheses were performed using lanthanides of similar size and reactivity to that of plutonium, namely cerium and neodymium. These experiments examined the electronic structure to compare and contrast the +2 oxidation state across the actinide series.In Chapter 1 29Si NMR spectra were recorded for a series of uranium complexes containing silicon and the data have been combined with results in the literature to determine if any trends exist between chemical shift and structure, ligand type, or oxidation state. Data on 48 paramagnetic inorganic and organometallic uranium complexes are presented. The survey reveals that although there is some overlap in the range of shifts of UIV complexes versus UIII complexes. In general UIII species have more negative shifts than their UIV analogs. The single UII example has the most negative shift of all at --322 ppm at 170 K. With only a few exceptions, UIV complexes have shifts between 0 and --150 ppm (vs. SiMe4) whereas U III complexes resonate between --120 and --250 ppm. The small data set on UV species exhibits a broad 250 ppm range centered near 40 ppm. The data also show that aromatic ligands such as cyclopentadienide, cyclooctatetraenide, and the pentalene dianion, exhibit less negative chemical shifts than other types of ligands.Chapter 2 describes the synthesis of new molecular complexes of U II that were pursued to make comparisons in structure, physical properties, and reactivity with the first UII complex, [K(crypt)][Cp '3U], 21-U (Cp' = C5H 4SiMe3, crypt = 2.2.2-Cryptand). Reduction of Cp ''3U, 20-U, [Cp'' = C 5H3(SiMe3)2--1,3] with KC 8 in the presence of crypt or 18-crown-6 generates [K(crypt)][Cp ''3U], 22-U, or [K(18-crown-6)(THF) 2][Cp''3U], 23-U, respectively. The UV/vis spectra of 22-U and 21-U are similar, and they are much more intense than those of UIII analogs. Variable temperature magnetic susceptibility data for 21-U and 22-U reveal a lower room temperature chiMT value relative to the experimental value for the 5f3 U III precursors. Stability studies monitored by UV/vis spectroscopy show that 22-U and 23-U have t 1/2 values of 20 and 15 h at room temperature, respectively, vs 1.5 h for 21-U. Complex 23-U reacts with H2 or PhSiH3 to form the uranium hydride, [K(18-crown-6)(THF) 2][Cp''3UH], 26. 21-U and 23-U both reduce cyclooctatetraene to form uranocene, (C8H8) 2U, as well as the UIII byproducts [K(crypt)][Cp '4U], 28-U, and Cp'' 3U, 20-U, respectively.In Chapter 3 Cp'4U, 37-U, was synthesized from (a) KCp' and [Cp' 3U(THF)][BPh4], 36, (b) Cp' 3U, 8-U, and Cp'2Pb,30, and (c) [K(crypt)][Cp'4U], 28-U, and AgBPh4 and identified by X-ray crystallography as a rare example of a structurally-characterized tetrakis(cyclopentadienyl)UIV complex. The corresponding Th complex, Cp'4Th, 37-Th, was obtained from the direct combination of ThBr4(THF)4 with excess KCp' in low yield. During the preparation of Cp' 3UMe, 35, the precursor of the [Cp '3U(THF)][BPh4], 36, reagent used above, it was discovered that the reaction of Cp'3UCl, 33-U, and MeLi gives a mixture of Cp'3UMe, 35 and 33-U that can co-crystallize better than 35 in pure form. Although 35 typically is an oil, a mixture of 35 and 33-U forms single crystals that are suitable for X-ray crystallography and contain a 4:1 ratio of the compounds. Hence, forming a mixture provided a new way to get structural data on the oil, 35. 33-U and Cp'3UI, 34, were also crystallographically characterized for comparison with the Cp '3UMe/Cp'3UCl, 35/33 crystals. (Abstract shortened by ProQuest.).

Book Synthesis Structure and Reactivity of Osmium vi Nitrido Imido and Oxo Complexes

Download or read book Synthesis Structure and Reactivity of Osmium vi Nitrido Imido and Oxo Complexes written by Jennifer Lynn Koch and published by . This book was released on 1997 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Formation and Reactivity of Surface bound High Oxidation State Ruthenium oxo Complexes

Download or read book Formation and Reactivity of Surface bound High Oxidation State Ruthenium oxo Complexes written by and published by . This book was released on 2004 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ruthenium polypyridyl oxalate complexes are precursors to high oxidation state species that can catalyze the oxidation of a variety of substrates. Covalent attachment of these reactive species to surfaces such at ZrO2 or TiO2 inhibit catalyst deactivation and provide supports from which to build electrocatalytic and photoelectrocatalytic devices. Unfortunately, few details of the effects of surface binding on reactivity are available in the literature. To this end, precursors such as, Ru(H2O3Ptpy)(C2O4)(H2O) and (C2O4)(H2O3Ptpy)Ru-O-Ru(H2O3Ptpy)(C2O4) (tpy is terpyridine) have been synthesized and attached to TiO2. Quantitative surface binding studies were carried out and acid catalyzed solvolysis was used to form the aqua species. The complexes were oxidized with Ce(IV) to their high-valent analogs and their reactivity toward selected substrates was tested. These studies not only provide information about the effects of surface binding on the reactivity of metal oxides but also have implications for the development of light-driven catalysts.

Book Synthesis Reactivity and Removal Studies of Rhenium Based Cluster Complexes with Heterocyclic Terminal Ligands

Download or read book Synthesis Reactivity and Removal Studies of Rhenium Based Cluster Complexes with Heterocyclic Terminal Ligands written by Joan N. Tirado and published by . This book was released on 2011 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book American Doctoral Dissertations

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1997 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt: