METAL-METAL BOND FORMATION AND REARRANGEMENT OF THE S2CPR3 LIGANDS INBINUCLEAR MANGANESE-MOLYBDENUM COMPLEXES - X-RAY STRUCTURE OF [MNMO(SNPH3)(CO)6(MU-S2CPPR(I)3)]

The reduction of complexes [MnMo(CO)6(mu-Br)(mu-S2CPR3)] (1) With Na[H g] produces the anions [MnMo(CO)6(mu-S2CPR3)]- (2), which can be trapp ed with ClSnPh3 to afford the stable derivatives [MnMo(SnPh3)(CO)6(mu- S2CPR3)] (3). An X-ray structure determination shows the formation of Mn-Mo and Sn-Mo bonds in compounds 3 and also the rearrangement of the S2CPR3 bridge: its central carbon, which was bonded to Mo in the star ting compounds 1, is now bonded to the Mn atom in complexes 3.