The structural definition of adducts of stoichiometry MX:dppx (1:1) M = CuI, AgI, X = simple anion, dppx=Ph2P(CH2)xPPh2, x = 3-6

Adducts of the form MX:dppx (1:1)(n), M = silver(I) or copper(I), X = simple (pseudo-) halide or oxy-anion, dppx=bis(diphenylphosphino)alkane, Ph2P(CH2)xPPh2, x = 3-6 have been synthesised and characterized by spectroscopy and X-ray crystal studies. Adducts are defined of two binuclear forms: (i) [dppxM(μ-X)2Mdppx], with each ligand chelating a single metal atom, and (ii) [M(μ-X)2(μ-(P-dppx-P′))2M′] where both ligands dppx and halides bridge the two metal atoms; a few adducts are defined as polymers, the ligands connecting M(μ-X)2M′ kernels, this motif persisting in all forms.