Preparation and X-ray crystallographic characterisation of an unusual heteronuclear complex, RhAg2(CCC6F5)5(PPh3)3

The complex RhAg2(CCC6F5)5(PPh3)3, prepared from RhCl(PPh3)3 and Ag(CCC6F5), contains a central rhodium atom which is octahedrally co-ordinated to one PPh3 ligand and five σ-acetylide units; each PPh3Ag group is π-bonded to three acetylenic bonds (one acetylenic linkage thereby being involved with both silver atoms); rhodium–silver distances are 3.086(1) and 3.102(1)A.