NEW PHOSPHIDO-BRIDGED MULTINUCLEAR COMPLE XES OF AG, CD AND ZN - THE CRYSTAL-STRUCTURES OF AG4(PPH2)4(PME3)4!, AG6(PPH2)6(PTBU3)2! AND M4CL4(PPH2)4(PNPR3)2!(M=ZN,CD)

AgCl reacts with Ph2PSiMe3 in the presence of a tertiary Phosphine PMe 3 or PtBu3 to form the multinuclear complexes Ag4(PPh2)4(PMe3)4! (1) and Ag6(PPh2)6(PtBu3)2! (2). In analogy to that MCl2 reacts with Ph2P SiMe3 in the presence of pn Pr, to form the two multinuclear complexes M4Cl4(PPh2)4(PnPr3)2! (M = Zn (3), Cd (4)). The structures were char acterized by X-ray single crystal structure analysis (1: space group P na2(1) (Nr. 33), Z = 4, a = 1313.8(11) pm, b = 1511.1(6) pm, c = 4 126 .0(18) pm, 2: space group P1BAR (Nr. 2), Z = 2, a = 1559.0(4) pm, b = 1885.9(7) pm, c = 2112.4(8) pm, alpha = 104.93(3)-degrees, beta = 94.4 8(3)-degrees, gamma = 104.41(3)-degrees; 3: space group C2/c (Nr. 15), Z = 4, a = 2 228.6(6) pm, b = 1847.6(6) pm, c = 1 827.3(6) pm, beta = 110.86(2); 4: space group C2/c (Nr. 15), Z = 4, a = 1894.2(9) pm, b = 1867.9(7) pm, c = 2 264.8(6) pm, beta = 111.77(3)-degrees). 3 and 4 m ay be considered as intermediates on the route towards polymeric M(PP h2)2!n (M = Zn, Cd).