CO substitution in the mixed-metal clusters PhCCo2Ni(CO)6Cp and PhCCo2Mo(CO)8Cp by (Z)-Ph2PCH=CHPPh2. X-ray diffraction structures and proof of ligand bridging in PhCCo2Ni(CO)4[(Z)-Ph2PCH=CHPPh2]Cp and PhCCo2Mo(CO)6[(Z)-Ph2PCH=CHPPh2]Cp - Simon Bott (Journal of Chemical Crystallography, 2004)