Showing papers on "Metathesis published in 1973"
TL;DR: In this paper, the reactions of the tin acetylides R3Sn·C⋮CPh (R = Me or Et) with some low oxidation state complexes of Mo0, MoII, Co0, RhI, IrI, and Pt0 have been investigated.
Abstract: The reactions of the tin acetylides R3Sn·C⋮CPh (R = Me or Et) with some low oxidation state complexes of Mo0, MoII, Co0, RhI, IrI, and Pt0 have been investigated. They fall into four classes : metathesis [e.g., with RhCl(CO)(PPh3)2→ Rh(C⋮CPh)(CO)(PPh3)2]; oxidative addition, with or without neutral ligand elimination [e.g., Ir(C⋮CPh)(CO)(PPh3)2→ Ir(C⋮CPh)2(SnMe3)(CO)(PPh3)2 or Pt(PPh3)2→ Pt(C⋮CPh)(SnMe3)(PPh3)2]; metathesis and oxidative addition [e.g., IrCl(CO)(PPh3)2→ Ir(C⋮CPh)2(SnMe3)(CO)(PPh3)2]; and oxidative cleavage [e.g., {Mo(π-C5H6)(CO)3}2→ Mo(π-C5H5)(SnMe3)(CO)3]. The structures of the compounds are assigned on the basis of spectroscopic data. Complexes having both SnR3 and acetylide units are regarded as mono-hapto-(PhC⋮C·M·SnR3) rather than bi-hapto-([graphic omitted]SnR3). Selected reactions of some of the new Rh, Ir, and Pt acetylides are described.
38 citations
TL;DR: In this paper, a decomposition scheme for the formation of apparent metathesis products as a side reaction of the cyclotrimerization of acetylenes to aromatic hydrocarbons is proposed.
31 citations
TL;DR: In this paper, a series of complexes of the type dichlorotetra(nitrile)ruthenium(II) [(RCN) 4 RuCl 2 ; R = CH 3, C 2 H 5, n-C 3 H 7, i-C3 H 7, C 6H 5, C 6 H 5 CH 2 ] was prepared by the catalyzed reduction of RuCl 3, 3H 2 O by hydrogen gas over Adam's catalyst in solution in the appropriate nitrile.
18 citations
TL;DR: The reaction of alcoholic KOH with (ArNC)AgCI gives σ-bonded organosilver compounds [Ag-C(OR)= NAr]3, which undergo metathesis with chloro-complexes of AuI, HgII, and PtII to give σ bonded alkyl complexes of these metals as mentioned in this paper.
Abstract: Reaction of alcoholic KOH with (ArNC)AgCI gives σ-bonded organosilver compounds [Ag–C(OR)= NAr]3, which undergo metathesis with chloro-complexes of AuI, HgII, and PtII to give σ-bonded alkyl complexes of these metals.
13 citations
TL;DR: In this paper, the authors show that Metathese-Reaktionen mit dem System (I) erhalt man je nach der Konzentration der Katalysatoren unterschiedliche Anteile an Metathesee-and an Alkylierungsreaktionsen, indem unterhalb eines Olefin-Katalysator-Verhaltnisses von 70 nur Alkylayerung, oberhalb von 400 nur MetatheSe und dazwischen die be
8 citations
6 citations
Patent•
28 Aug 1973
TL;DR: In this article, a process for the modification of unsaturated polyolefin rubbers by reaction with other polymers amenable to the metathesis reaction, in the liquid phase, preferably in solution, is described.
Abstract: A process for the modification of unsaturated polyolefin rubbers by reaction with other polymers amenable to the metathesis reaction, in the liquid phase, preferably in solution, in the presence of a metathesis catalyst system comprising (a) a soluble compound of a metal of the Subgroups V through VII of the periodic table, and (b) a soluble alkyl or hydride of a metal of Main groups I through III of the periodic table, as well as optionally activators, characterized by the metallic components of the catalyst system each being dispersed, preferably dissolved, separately in partial streams wherein the reaction components are contained, and these partial streams are intermixed intensively.
4 citations