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Showing 1 to 20 of 109 for “"osmium"”.
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Thiocyanate complexes of osmium
<p>Osmium is a hard grey brittle metal which scratches glass. It has a melting point of 2700[degree]C, and a specific gravity of 22.4, which is greater than any other known substance. The grey color of osmium resembles the grey color of iron and ruthenium. Osmium was discovered in 1803 by Tennant …
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Chemistry of low-valent osmium
… and reactivity of complexes of d⁶ and d⁸ osmium. The reactivity of certain ligands coordinated to low-valent osmium has also been investigated. Various hydride complexes of osmium(II) were prepared as potential precursors of osmium(O). OsH₄(PPh₃)₃ reacts with p-tolylisocyanide (TIC) and …
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Moessbauer Scattering Studies With the Isotopes Osmium-186, Osmium-188, Europium-153, and Praseodymium-141
Made available in DSpace on 2015-05-12T21:41:32Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6507141.PDF: 1887574 bytes, checksum: 4970cd47ca2bbad51bf2c2904b26bedd (MD5) Previous issue date: 1965
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Chiral Organometallic osmium(VI) Nitrido Complexes
… 2]- forms in a reaction of a mixed tetraalkyl osmium nitrido complex with pyridinium chloride. Reactions between Ag2CrO 4 and [Os(N)(CH2SiMe3)MeCl2] - or [Os(N)(CH2SiMe3)PhCl2] - give chiral-at-metal heterobimetallic complexes that catalyze the oxidation of primary and secondary alcohols using …
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Osmium complexes as models for CO reduction intermediates
… of the chemistry, of carbon-donor complexes of osmium as organo-metallic models for CO reduction intermediates. In Chapter 1 some aspects of ligand reactivity of the carbon-donor ligands CO, CS, CSe, CTe and carbenes in transition metal complexes are reviewed. The reduction reactions of these …
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Oxo, imido, and nitrido compounds of osmium(VI)
… and n-butylammonium salts of tetrachlorodioxoosmium were prepared. Alkylation of (PPh$\sb4$) (Os(O)$\sb2$Cl$\sb4$) with trimethylsilylmethylmagnesium chloride yields oxotetrakis(trimethylsilylmethyl)osmium. The crystal structure of Os(O)(CH$\sb2$SiMe$\sb3$)$\sb4$ was determined. The physical …
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Trispyrazolylborate and Tetramethylcyclopentadienyl Osmium Chemistry: Toward Methane Coordination Complexes
… ligand and two bromides bridge between the two osmium centers. This anion is the first example of an anionic diosmium complex containing a bridging hydride.
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Organometallic imido, sulfido and oxo complexes of osmium(VI)
… acetylenes were reviewed in Chapter 1. The alkylosmium(VI) complexes (Y) (Os(N)(R)$\sb2$Cl$\sb2$), Os(N)(CH$\sb2$SiMe$\sb3)\sb2$Cl, Os(N)(CH$\sb2$SiMe$\sb3)\sb2$Cl(NC$\sb5$H$\sb5)$, Os (N)(CH$\sb2$SiMe$\sb3)\sb3$(Z) and (Os(N)(CH$\sb2$SiMe$\sb3)\sb2$(X)$\sb2$) (BF$\sb4$) where Y = NBu$\sp{\rm …
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Osmium alkane complexes: Synthesis, characterization, and isotopic labeling studies
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-05-01
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