DI-METALLIC AND TRI-METALLIC COMPLEXES CONTAINING 2 BRIDGING CYCLODIPHOSPHAZANE LIGANDS - THE CRYSTAL-STRUCTURE OF [MO-2(CO)(8)(MU-CIS-[PHNP(OC(6)H(4)ME-P)](2))(2)]

The reactions of the mononuclear cyclodiphosphazane complexes, cis-[Mo (CO)(4){cis-[PhNP(OR)](2)}(2)] with [Mo(CO)(4)(nbd)] (nbd = norbornadi ene). [Mo(CO)(4)(NHC5H10)(2)] or [MCl(2)(cod)] (cod = cycloocta-1,5-di ene) afforded the homobimetallic complexes; [Mo-2(CO)(8){mu-cis-[PhNP( OR)](2)}(2)] (R = C(5)H(4)Me-p 5 or CH2CF3 6) or the heterobimetallic complexes. [Mo-2(CO)(8){mu-cis-[PhNP(OE)](2)}(2)MCl(2)] (R = C(6)H(4)M e-p; M = Pd 7 or Pt 8). In all the above complexes, the two metal moie ties are bridged by two cyclodiphosphazane ligands. The reactions of t he mononuclear complexes, cis-[M(CO)(4)(A){cis-[PhNP(OC(6)H(4)Me-p)](2 )}] with (M'Cl-2(cod)] afforded the trinuclear complexes, l-2[M(CO)(4) (A){cis-[PhNP(OC(6)H(4)Me-p)](2)}](2)] (M' = Pd, M = Mo, A = P(OMe)(3) 10; M' = Pt, M = Mo. A = P(OMe)(3) 11; M' = Pd. M = W. A = NHC5H10 12 ; M' = Pt, M = W. A = NHC5H10 13). The structure of the complex 5 has been determined by single-crystal X-ray crystallography.