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Reactivity of the Amido Complex [Re(NHpTol)(CO)3(bipy)] toward Neutral Organic Electrophiles
dataset
posted on 2002-12-17, 00:00 authored by Eva Hevia, Julio Pérez, Víctor Riera, Daniel MiguelThe amido complex [Re(NHpTol)(CO)3(bipy)] (1) reacts with pTolNCS and with Ph2CCO
giving the products of the insertion of these heterocumulenes into the Re−N and N−H bonds,
the complexes [Re{SC(NpTol)(NHpTol)}(CO)3(bipy)] (2) and [Re{N(pTol)C(O)CHPh2}(CO)3(bipy)] (3), respectively. The reaction of 1 with activated acetylenes containing at least one
alkoxycarbonyl group afforded the compounds [Re{N(pTol)C(R‘)C(R)C(OH)}(CO)3(bipy)] (4a−c). The formation of the metallacycle present in these compounds involves the activation of
one of the carbonyl ligands of 1. The structures of the complexes 2, 3, and 4b have been
determined by single-crystal X-ray diffraction. 13C NMR and crystallographic data indicate
that the metal-bonded carbon atom of the metallacycle possesses carbene character.