Structure of (μ-acetato-1κO:2κO')-nonacarbonyl-1κ3C,2κ3C,3κ3C-μ-hydrido-(triphenylphosphine-3κP)-triangulo-triosmium(3 Os–Os) cyclohexane solvate

Abstract

1843sp3-hybridized head atoms C8 and C8' of the ring linkage to a bicyclo system. This is also the main reason for the two connected phthalocyaninato units not being planar. The whole ligand is an anion with three negative charges.The C--N distances refect the interruption of the conjugation. The bonds at the head atom C8 average 1-476 A, and this is close to the expected value for a single bond between sp3-and sp2-hybridized atoms. They adjoin shorter bonds of about 1-285 A which represent double bonds. The other C--N distances have intermediate values of 1.323 to 1.441 A, being typical for a conjugated C-N system.The coordination of the Nb atom is completed by one chloro ligand to a monocapped trigonal prism. The C1, Nb and the atom N4 lie on a twofold axis. The complex therefore has the symmetry 6"2. (Received 8 December 1989; accepted 8 February 1990) Abstract. [Os3(C2H302)(H)(CO)9(P(C6Hs)3}l