Dalton communications. A zwitterionic cluster compound: synthesis and characterisation of the triphenylphosphoniocyclo-pentadienide derivative [Ru 6 C(CO) 14 (η 5 -C 5 H 4 PPh 3 )]

The crystal and molecular structure of the zwitterionic octahedral cluster, [Ru6C(CO)14(η5-C5H4PPh3)], prepared from the reaction of [Ru6C(CO)17] with trimethylamine N-oxide in the presence of triphenylphosphoniocyclopentadienide, has been established by low-temperature single-crystal X-ray diffraction analysis, and shows intermolecular interactions typical of zwitterionic compounds.