Bis[μ-bis(diphenylphosphanyl)methane-κ2 P:P′](μ-1-ethylthiourea-κ2 S:S)bis[iodidocopper(I)] acetonitrile sesquisolvate

Abstract

In the dinuclear title compound, [Cu2I2(C 3H8N2S)(C25H22P 2)2]·1.5CH3CN, each CuI atom exhibits a distorted tetrahedral coordination with two P atoms from two bis-(diphenylphosphanyl) methane (dppm) ligands, one metalbridging S atom from the 1-ethylthiourea (ettu) ligand and one iodide ion. The dppm ligand and the bridging S atom of the ettu ligand force the two copper atoms into close proximity, leading to the formation of a close intramolecular Cu Cu contact [3.3747 (17) A ]. The conformation of the dimeric complex is such that the two dppm ligands are located on one side of the dinuclear metal complex, while the two iodine atoms are pointed towards the other side of the complex, a conformation that is stabilized by two intramolecular N-H I hydrogen bonds between the ettu NH2 and NHEt moieties and the I atoms. Another pair of symmetry-equivalent N-H I hydrogen bonds is established between neighboring molecules across an inversion center, linking molecules into dimers. The dimers are connected with each other and with the interstitial acetonitrile solvent molecules via a range of weaker C-H I and C-H S interactions and through weak C-H φ interactions, leading to the formation of a three-dimensional network. One of the acetonitrile solvent molecules is disordered in a 1:1 ratio across a crystallographic inversion center.