COMPLEXATION OF [OMEGA-DIPHENYLPHOSPHINOALKYL]DIPHENYLPHOSPHINE SULFIDES WITH AGNO3

By reaction of [omega-diphenylphosphinoalkyl]diphenylphosphine sulphid es Ph2P(CH2)(n)P(S)Ph-2 (n = 2-4) (L-1-L-3) with AgNO3 in CH3CN crysta lline complexes with the composition metal:ligand 1:1 [Ag(L-1)NO3, Ag( L-2)NO3, Ap(L-3)NO3] and 1:2 [Ag(L-1)(2)NO3: Ag(L-3)(2)NO3] were isola ted. According to the X-ray analysis data. the crystals of Ag(L-1)NO3 are constructed from centrosymmetric dimeric molecules based on the 12 -membered macrocycle AgSPCH2CH2PAgSPCH2CH2P. Each of the neutral ligan ds L-1 is a bridge between two silver ions and each of the silver ions is coordinated by a chelating NO3 group. According to the IR spectra, the other 1:1 groups of the 1:1 complexes are replaced by the complex es also have an analogous structure. In the 1:2 complexes the coordina ted NO3 phosphine sulphide ligand. The downfield shifts of the signals of P-III and P-V atoms in P-31 NMR spectra of 1:2 complexes in compar ison with the free ligands L-1 and L-3 reflect a participation of the P-III atom and P=S group in complex formation. (C) 1997 Elsevier Scien ce S.A.