Polymer and cage-type structures in silver(I) complexes with heterocyclic thiones and bridging diphosphine ligands. Crystal structures of [Ag(μ-dpppent)(tHpymtH)(ONO2)]n and [Ag2(μ-trans-dppen)3(pymtH)2](NO3)2 · CH3CN

The behaviour of the diphos ligands 1,5-bis(diphenylphosphino)pentane (dppent) and trans-1,2-bis(diphenylphosphino)ethene (trans-dppen) towards coordination of Ag(I) nitrate in the presence of several heterocyclic thione ligands has been investigated. Both diphosphines adobt the doubly-bridging coordination mode, however, dependent on the nature of the diphos ligand, two types of products have been obtained for the tetrahedraly coordinated metal, namely polymer in the case of the longer chained dppent and triply bridged dimer for the short bite trans-dppen. The crystal structure of one representative for each of these two types have been characterized by X-ray crystallography.