TY - JOUR
T1 - Synthesis and nuclear magnetic resonance studies of co-ordinatively unsaturated alkyne complexes of tungsten(II)
AU - Davidson, Jack L.
AU - Vasapollo, Giuseppe
PY - 1985
Y1 - 1985
N2 - [{WBr2(CO)4}2] reacts with alkynes RC=CR' (R = R' = Me, Et, or Ph) and PhC=CMe to give dimeric complexes [{WBr2(CO)(RC=CR')2}2]. These react with nucleophiles (L) to give monoalkyne complexes [WBr2(CO)L2(RC=CR')] [L = CNBut, P(OMe)3, or PPh3; R = R' = Me or Ph; R = Me, R' = Ph) which exist in cis and/or trans isomeric forms and which exhibit alkyne 'propeller rotation' according to 1H and 31P n.m.r. studies. The isolation of [WBr2(CO)(CNBut)(MeC=CMe)2] indicates that the reactions proceed via monomeric bis-alkyne intermediates.
AB - [{WBr2(CO)4}2] reacts with alkynes RC=CR' (R = R' = Me, Et, or Ph) and PhC=CMe to give dimeric complexes [{WBr2(CO)(RC=CR')2}2]. These react with nucleophiles (L) to give monoalkyne complexes [WBr2(CO)L2(RC=CR')] [L = CNBut, P(OMe)3, or PPh3; R = R' = Me or Ph; R = Me, R' = Ph) which exist in cis and/or trans isomeric forms and which exhibit alkyne 'propeller rotation' according to 1H and 31P n.m.r. studies. The isolation of [WBr2(CO)(CNBut)(MeC=CMe)2] indicates that the reactions proceed via monomeric bis-alkyne intermediates.
UR - http://www.scopus.com/inward/record.url?scp=37049108755&partnerID=8YFLogxK
U2 - 10.1039/DT9850002239
DO - 10.1039/DT9850002239
M3 - Article
SN - 1472-7773
SP - 2239
EP - 2245
JO - Journal of the Chemical Society, Dalton Transactions
JF - Journal of the Chemical Society, Dalton Transactions
IS - 11
ER -