Synthesis and characterization of the (μ3-CR)Co3 tetrahedral carbonyl clusters containing (μ3,η3-(PPh2CH2)3CCH3) ligand and the crystal structure of cluster (μ3-CPh)CCo3(CO)3(μ-CO)3 (μ3,η3-(PPh2CH2)3 CCH3)

Two new (mu(3)-CR)Co-3 tetrahedral carbonyl clusters containing (mu(3),eta(3)-(PPh2CH2)(3)CCH3) ligand, (mu(3)-CPh)Co-3(CO)(3)(mu-CO)(3)[mu(3),eta(3)-(PPh2CH2)(3)CCH3] 1 and (mu(3)-CCO2C(CH3)(3))Co-3(CO)(3)(mu-CO)(3)[mu(3),eta(3)-(PPh2CH2)(3)CCH3] 2 have been synthesized by the substitution reactions of (mu(3)-CR)Co-3 tetrahedral metal carbonyl clusters, (mu(3)-CPh)Co-3(CO)(9) and (mu(3)-CCO2C(CH3)(3))Co-3(CO)(9) with the triphosphine compound CH3C(CH2PPh2)(3) (1,1,1-tris(diphenylphosphinomethyl) ethane: triphos) in THF at 60 C, respectively. Clusters 1 and 2 were characterized by IR, H-1 NMR, P-31 NMR and MS spectroscopy. The crystal structure of cluster 1 has also been determined by single-crystal X-ray diffraction.