Acetylenic Phosphines Bridging Two Cluster Units: Molecular Structure of {Ru3(µ-H)(µ3-C2But )(CO)8}2(µ-dppa)[dppa =C2(PPh2)2]

Abstract

The syntheses of two complexes consisting of two Ru₃(µ-H)(µ₃-C₂Bu^t)(CO)₈ clusters bridged by acetylenic ditertiary phosphines, C₂(PR₂)₂ [R = Ph (3), Buⁿ (4)], are described. The molecular structure of (3) confirms that substitution of the cluster at the ruthenium which is σ bonded to the acetylide has occurred. The structural parameters closely resemble those of Ru₃(µ−H)(µ₃-C₂Bu^t)(CO)₈(L) [L = CO, PPh₂(OEt)].