PMe3-induced CO insertion and CO deinsertion in the zwitterionic hydrocarbyl complex Co2(CO)4[μ-PhCC(H)PPh2CC(PPh2)C(O)OC(O)]: Syntheses and X-ray structures of Co2(CO)3(PMe3)[μ-PhC(CO)C(H)PPh2CC(PPh2)C(O)OC(O)] and Co2(CO)3(PMe3)[μ-PhCC(H)PPh2CC(PPh2)C(O)OC(O)] - Simon Bott (Polyhedron, 2007)