Single and double nucleophilic attack on cluster-bonded allenylidenes: Synthesis of phosphorus heterocycles

Attack of bidentate tertiary phosphines, such as dppm and dppe, on Ru3(μ-H){μ3-C2CHR(OH)}(CO)9 (R = H, Me) in the presence of HBF4 afford [Ru3(μ3-C2CH2PPh2CH2CH2PPh2)(CO)9]BF4 and Ru3(μ-H){μ3-C2CHMePPh2CHPPh2}(CO)9, containing diphospha heterocycles, or Ru3(μ-H){μ3-CH2(OH)C2PPh2CH2PPh2}(CO)8, containing a phosphonium-alkynyl, by attack of the Group 15 ligand on an alkynyl or allenylidene ligand on the cluster.