[WBr2(CO)4]n reacts with alkynes to give complexes [WBr2CO(RC≡CR)2]2 (I, R = R' = Me, Et, Ph; R = Me, R' = Ph), which react with nucleophiles L [L = CNCMe3, PPh3, or P(OMe)3] to give monoalkyne derivs. [WBr2(CO)(RC≡CR')L2]. An intermediate bis-alkyne adduct [WBr2CO(MeC≡CMe)2(CNCMe3)] was isolated in the reaction of [WBr2(CO)(MeC≡CMe)2]2 with CNCMe3 illustrating that cleavage of the dimer I is the first stage in these reactions.
Coordinatively unsaturated alkyne complexes: synthesis of mono and bisalkyne complexes of tungsten(II)
VASAPOLLO, Giuseppe
1983-01-01
Abstract
[WBr2(CO)4]n reacts with alkynes to give complexes [WBr2CO(RC≡CR)2]2 (I, R = R' = Me, Et, Ph; R = Me, R' = Ph), which react with nucleophiles L [L = CNCMe3, PPh3, or P(OMe)3] to give monoalkyne derivs. [WBr2(CO)(RC≡CR')L2]. An intermediate bis-alkyne adduct [WBr2CO(MeC≡CMe)2(CNCMe3)] was isolated in the reaction of [WBr2(CO)(MeC≡CMe)2]2 with CNCMe3 illustrating that cleavage of the dimer I is the first stage in these reactions.File in questo prodotto:
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