Formal coupling of two alkylidyne ligands on a metal center
- 1 July 1992
- journal article
- research article
- Published by Wiley in European Journal of Inorganic Chemistry
- Vol. 125 (7) , 1583-1588
- https://doi.org/10.1002/cber.19921250712
Abstract
Reaction of the alkylidyne complexes [W(CR)Br(CO)3L] [2b (L = CO; R = C6H4‐OMe‐4), 2c (L = CO, R = C6H4‐NMe2‐4), 3a (L = PPh3; R = Ph), and 3c (L = PPh3; R = C6H4‐NMe2‐4)] with methyllithium in THF at ‐78°C affords the alkylidyne acyl tungsten complexes Li[W(CR)(COMe)Br(CO)3L] [4b (L = CO; R = C6H4‐OMe‐4), 4c (L = CO, R = C6H4‐NMe2‐4), 5a (L = PPh3; R = Ph), and 5c (L = PPh3; R = C6H4‐NMe2‐4)]. Reaction of complexes 4 and 5 with C2O2Br2 at ‐78°C‐0°C in CH2Cl2 followed by addition of PPh3 gives the alkyne complexes [WBr2(CO)(CH3C = CR)(PPh3)2] (6). The formation of the alkyne ligands in complexes 6 may be considered as the result of formal coupling of two alkylidyne ligands.Keywords
This publication has 45 references indexed in Scilit:
- Synthesis of carbyne complexes of chromium, molybdenum, and tungsten by formal oxide abstraction from acyl ligandsOrganometallics, 1987
- Formal Insertion of the HCO⊕ Fragment into a Trinuclear Cluster Metal‐Carbyne Bond: Synthesis, Structure and Reactivity of Cluster‐bound EthynolAngewandte Chemie International Edition in English, 1986
- Photoinduced carbonylation of the carbyne ligand in (.eta.-C5H5)(CO)2W.tplbond.CTolOrganometallics, 1986
- Synthesis and nuclear magnetic resonance studies of co-ordinatively unsaturated alkyne complexes of tungsten(II)J. Chem. Soc., Dalton Trans., 1985
- Theoretical prescription for reductive coupling of carbonyl or isocyanide ligandsJournal of the American Chemical Society, 1983
- Book Review: The Inorganic Chemistry of Biological Processes. By M. N. HughesAngewandte Chemie International Edition in English, 1982
- Synthesis of Alkyne‐Bridged Dinuclear Complexes by Reaction of trans‐Halotetracarbonyl(methylcarbyne)‐tungsten with Methylenebis(diphenylarsane)Angewandte Chemie International Edition in English, 1977
- Alkin-verbrückte Zweikernkomplexe durch Umsetzung vontrans-Halogenotetracarbonyl(methylcarbin) wolfram mit Methylenbis(diphenylarsan)Angewandte Chemie, 1977
- Übergangsmetall‐Carbin‐Komplexe, XVII. Ringsubstituierte trans ‐Bromotetracarbonyl(phenylcarbin)‐Komplexe von Chrom und WolframEuropean Journal of Inorganic Chemistry, 1977
- Carbonyl‐η‐cyclopentadienyl‐(4‐methylphenylketenyl)‐bis(trimethylphosphan)wolfram ‐ ein neuartiges, stabiles übergangsmetall‐substituiertes KetenAngewandte Chemie, 1976