EBookClubs

Read Books & Download eBooks Full Online

EBookClubs

Read Books & Download eBooks Full Online

Book Structural Studies of Some Polynuclear Carbonyl Clusters of Ruthenium and Osmium and Their Complexes with Small Organic Molecules and Hydrogen

Download or read book Structural Studies of Some Polynuclear Carbonyl Clusters of Ruthenium and Osmium and Their Complexes with Small Organic Molecules and Hydrogen written by W. J. H. Nelson and published by . This book was released on 1980 with total page 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 1998 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Ruthenium and Osmium Nitrogen Mulitple Bonded Complexes with Chelating Nitrogen And or Oxygen Atom Donor Ligands

Download or read book Ruthenium and Osmium Nitrogen Mulitple Bonded Complexes with Chelating Nitrogen And or Oxygen Atom Donor Ligands written by Ka-Lai Yip and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Ruthenium and osmium-nitrogen mulitple bonded complexes with chelating nitrogen and/or oxygen atom donor ligands: synthesis, structures and reactivity studies" by Ka-lai, Yip, 葉嘉麗, 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_b4501517 Subjects: Ruthenium compounds - Synthesis Osmium compounds - Synthesis Ligands Chelates

Book The Chemistry of Metal Cluster Complexes

Download or read book The Chemistry of Metal Cluster Complexes written by Duward F. Shriver and published by Wiley-VCH. This book was released on 1990 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seven chapters summarize the current status of organometallic cluster chemistry from the viewpoints of synthesis, structure and bonding, ligand substitution reactions, ligand transformations, polyhedral rearrangement, cluster fragmentation reactions, and metal clusters as homogeneous catalysts. An eighth provides an extensive bibliography of reviews for the period from 1965 to 1988. Annotation copyrighted by Book News, Inc., Portland, OR

Book Ruthenium and Osmium nitrogen Mulitple Bonded Complexes with Chelating Nitrogen And or Oxygen Atom Donor Ligands

Download or read book Ruthenium and Osmium nitrogen Mulitple Bonded Complexes with Chelating Nitrogen And or Oxygen Atom Donor Ligands written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: (Uncorrected OCR) Abstract of thesis entitled RUTHENIUM AND OSMIUM-NITROGEN MULITPLE BONDED COMPLEXES WITH CHELATING NITROGEN AND / OR OXYGEN ATOM DONOR LIGANDS: SYNTHESIS, STRUCTURES AND REACTIVITY STUDIES Submitted by Yip Ka Lai for the degree of Doctor of Philosophy at The University of Hong Kong in March 2005 The chemistry of late transition metal-nitrido complexes have been a growing interest especially for nitrido-ruthenium(VI) and -osmium(VI) metal complexes. However, the reactivity studies on those nitride complexes are sparse in the literature. As a result, the reactivities of nitridoruthenium(VI) complexes toward nucleophilic, electrophilic and oxidizing agents were studied. [Ru^CNXL^Cl] [H2L1 = 2,6-bis(2,2-diphenyl-2-hydroxyethyl)pyridine] underwent nitrogen atom transfer reaction with PPI13, PPhMe2 (dimethylphenylphosphine) and dppe [l,2-bis(diphenylphosphino)ethylene] to give [RuIII(HL1)(PPh3)Cl2], [Ru^XPPhMe^Cl] and [RuIII(L1)(dppe)Cl], respectively. In the presence of py or Hpz, the reaction of [Ru^^XL^Cl] gave [RuIII(L1)(py)2Cl] and [RuIII(L1)(Hpz)3]Cl as respective products. An unsymmetrical u-nitrido dinuclear ruthenium complex, [Ru^L^ChCu-N^u^L'XCsHioN^l], was formed upon reaction of [Ru^CNXL^Cl] with 2,6-dimethylaniline. Excess (Me30)BF4 reacted with [Ru^CNXL^Cl] to give a dinuclear u-OH complex, [Ru2(N)2(L1)2(OH)]PF6. For the analogous reaction with [n-Bu4N][MVI(NXL)] [L = L2 and L3; M = Os and Ru; H4L = l,2-dichloro-4,5-bis(2-hydroxybenzamido)benzene, H4L = l,2-bis(2-hydroxybenzamido)benzene], protonation at the auxiliary ligand occurred to give [M^CNXHL)] as product. Oxidation of [n-Bu4N][OsVI(N)(L2)] by PhI(OAc)2 produced [n-Bu4N][OsVI(N)(L202)] in 10% yield. Based on X-ray crystal analysis, the coordinated phenoxy moiety was converted to a benzoquinone moiety while the Os=N group remained intact. A synthetic route for preparing ruthenium pyridyl-amine complexes bearing chelating tertiary amine 'ligands was developed. At pH 1.0, the cyclic vo.

Book Synthesis and Reactivity Studies of High nuclearity Carbido Carbonyl Clusters of Heptarhenium iridium and Decaruthenium

Download or read book Synthesis and Reactivity Studies of High nuclearity Carbido Carbonyl Clusters of Heptarhenium iridium and Decaruthenium written by Linqing Ma and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The cluster anion ($\rm Re\sb7C(CO)\sb{21}Ir(C\sb8H\sb{14})(CO)\rbrack \sp{2-}$ has been synthesized by the capping of ($\rm Re\sb7C(CO)\sb{21}\rbrack \sp{3-}$ with the in-situ generated cationic species from the reaction of ($\rm Ir(C\sb8H\sb{14})\sb2(CO)Cl\rbrack \sb2$ and AgBF$\sb4.$ This new heptarhenium-iridium compound reacts with two electron donors to give ligand-substituted compounds ($\rm Re\sb7C(CO)\sb{21}Ir(L)(CO)\rbrack \sp{2-}$ (L = CO, $\rm C\sb2H\sb4,$ PMePh$\sb2,$ and PPh$\sb3),$ and with triphenylsilane and allyl bromide to form the oxidative addition products ($\rm Re\sb7C(CO)\sb{21}Ir(H)(CO)(SiPh\sb3)\rbrack \sp{2-}$ and ($\rm Re\sb7C(CO)\sb{21}Ir(\eta\sp3C\sb3H\sb5)(CO)\rbrack \sp-.$ The reactivities at iridium parallel those of the indenyl complex $\rm (\eta\sp5C\sb9H\sb7)Ir(C\sb8H\sb{14})(CO),$ thus giving further support for the previously proposed analogy between ($\rm Re\sb7C(CO)\sb{21}\rbrack \sp{3-}$ and the cyclopentadienyl ligand and its derivatives. Formulation and characterization of these new compounds are based on elemental analysis, IR, $\sp1$H and $\sp{13}$C NMR spectroscopies, fast-atom bombardment mass spectrometry, and X-ray crystallography. The cluster anion ($\rm Re\sb7C(CO)\sb{21}Ir(CO)\sb2\rbrack \sp{2-}$ undergoes an irreversible framework isomerization process in solution to form a new isomer $\rm \{\lbrack Re(CO)\sb3\rbrack\sb2\lbrack Re\sb5IrC(CO)\sb{17}\rbrack \}\sp{2-}.$ Kinetic studies have been carried out, and a reaction mechanism has also been proposed. In refluxing acetonitrile $\rm \{\lbrack Re(CO)\sb3\rbrack\sb2\lbrack Re\sb5IrC(CO)\sb{17}\rbrack \}\sp{2-}$ loses a Re(CO)$\sb3\sp+$ fragment, leading to the formation of $\rm \lbrack Re\sb6IrC(CO)\sb{20}\rbrack \sp{3-}.$ This analog of $\rm \lbrack Re\sb7C(CO)\sb{21}\rbrack \sp{3-}$ reacts with Au(PPh$\sb3)$Cl to give ($\rm Re\sb6IrC(CO)\sb{20}Au(PPh\sb3)\rbrack \sp{2-}$ and $\rm \{Re\sb6IrC(CO)\sb{20}\lbrack Au(PPh\sb3)\rbrack \sb2\}\sp-,$ which have been characterized by $\sp{31}$P and $\sp{13}$C NMR studies. The known cluster anion ($\rm Ru\sb{10}C\sb2(CO)\sb{24}\rbrack \sp{2-}$ can be prepared via an alternative route involving the redox condensation of ($\rm Ru\sb6C(CO)\sb{16}\rbrack \sp{2-}$ and Ru$\sb5$C(CO)$\sb{15}.$ Substitution of two apical carbonyls in ($\rm Ru\sb{10}C\sb2(CO)\sb{24}\rbrack \sp{2-}$ by one diphenylacetylene molecule gives the compound ($\rm Ru\sb{10}C\sb2(CO)\sb{22}(C\sb2Ph\sb2)\rbrack \sp{2-},$ which contains a new ruthenium-ruthenium bond between the two apical atoms in the bioctahedral structure. Carbonyl ligand dynamic exchange behavior has been observed by variable-temperature $\sp{13}$C NMR spectroscopy.

Book Synthesis and Reactivity of Ruthenium Carbonyl Nitrido Clusters

Download or read book Synthesis and Reactivity of Ruthenium Carbonyl Nitrido Clusters written by Margaret Louise Blohm and published by . This book was released on 1985 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Reactivity of Ruthenium II and Osmium II Organometallic Imido Complexes

Download or read book Synthesis and Reactivity of Ruthenium II and Osmium II Organometallic Imido Complexes written by Richard Ira Michelman and published by . This book was released on 1992 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Dissertation Abstracts International

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1990 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Structural Studies on Polynuclear Osmium and Ruthenium Carbonyl Hydrides

Download or read book Structural Studies on Polynuclear Osmium and Ruthenium Carbonyl Hydrides written by Romana Alexandra Lashewycz and published by . This book was released on 1979 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Reactivity of Compounds Containing Ruthenium carbon nitrogen and oxygen Bonds

Download or read book Synthesis and Reactivity of Compounds Containing Ruthenium carbon nitrogen and oxygen Bonds written by and published by . This book was released on 1990 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: The products and mechanisms of the thermal reactions of several complexes of the general structure (PMe3)4Ru(X)(Y) and (DMPM)2Ru(X)(Y) where X and Y are hydride, aryl, and benzyl groups, have been investigated. The mechanism of decomposition depends critically on the structure of the complex and the medium in which the thermolysis is carried out. The alkyl hydride complexes are do not react with alkane solvent, but undergo C-H activation processes with aromatic solvents by several different mechanisms. Thermolysis of (PMe3)4Ru(Ph)(Me) or (PMe3)4Ru(Ph)2 leads to the ruthenium benzyne complex (PMe3)4Ru([eta]2-C6H4) (1) by a mechanism which involves reversible dissociation of phosphine. In many ways its chemistry is analogous to that of early rather than late organo transition metal complexes. The synthesis, structure, variable temperature NMR spectroscopy and reactivity of ruthenium complexes containing aryloxide or arylamide ligands are reported. These complexes undergo cleavage of a P-C bond in coordinated trimethylphosphine, insertion of CO and CO2 and hydrogenolysis. Mechanistic studies on these reactions are described. The generation of a series of reactive ruthenium complexes of the general formula (PMe3)4Ru(R)(enolate) is reported. Most of these enolates have been shown to bind to the ruthenium center through the oxygen atom. Two of the enolate complexes 8 and 9 exist in equilibrium between the O- and C-bound forms. The reactions of these compounds are reported, including reactions to form oxygen-containing metallacycles. The structure and reactivity of these ruthenium metallacycles is reported, including their thermal chemistry and reactivity toward protic acids, electrophiles, carbon monoxide, hydrogen and trimethylsilane. 243 refs., 10 tabs.