Abstract
AbstractReaction of cis‐Ru(κ2‐OAc)2(PPh3)2 with two‐electron donor ligands L results in the formation of complexes trans‐[Ru(κ1‐OAc)(κ2‐OAc)L(PPh3)2] (L = CO, NO+, CNtBu). Vinylidene complexes (L = C=CHR) may be prepared from the corresponding reaction with terminal alkynes HC≡CR, and species containing hydroxyvinylidene ligands (L = C=CHCR1R2{OH}) may be prepared from related reactions with propargyl alcohols HC≡CCR1R2{OH}. Treatment of cis‐Ru(κ2‐OAc)2(PPh3)2 with ω‐alkynols HC≡C(CH2)nOH (n = 2–4) results in the formation of oxacyclocarbene complexes [L = CCH2(CH2)nO]. An analysis of the spectroscopic data and the structural metrics (as determined by X‐ray crystallography) of this series of complexes allows for the relative donor/acceptor properties of the ligand L to be evaluated. This comparison indicates that the vinylidene ligand behaves in a similar fashion to the isocyanide ligand.
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