ASSEMBLAGE OF MULTIMETAL COMPLEXES USING THE DIPHOSPHOXANE (P-O-P) LINKAGE

Article abstract of DOI:10.1016/S0022-328X(00)99180-0

Heterobimetallic complexes can be prepared using the monodentate diphosphoxane ligang in Mo(CO)5PPh2OPPh2.Reactions with Cr(CO)5CH3CN and Fe2(CO)9 yielded the corresponding bimetallic products.The structure of Mo(CO)5PPh2OPPh2Fe(CO)4 was established by a single-crystal X-ray study.Cell data: Space group P1, monoclinic, a 10.533(2), b 10.993(2), c 16.439(3) Angstroem; α 97.86(2), β 92.34(1), γ 116.20(1)deg; Z = 2, D_c 1.561 g cm ^-3.R_F is 0.037 for 3830 observed reflections.The diphosphoxane ligand was found to bridge an octahedral Mo and the axial site of a trigonal bipyramidal Fe.Reaction of two equivalents of Mo(CO)5PPh2OPPh2 with (PhCN)2PdCl produced the trimetallic complex trans-PdCl22.The trimetallic complexes P3 were prepared from the reaction of PCl3 with Na (R = Ph, OEt).Similarly, a bimetallic complex PhP2 can be prepared from PhPCl2.These products illustrate the usefulness of the diphosphoxane linkage in the synthesis of multimetal complexes.