Synthesis and X-ray crystal structure of a weak molecular adduct of diphenylmercury(II) with 1,2-bis(diphenylphosphinothioyl)ethane

Abstract

Reaction of diphenylmercury(II) with 1,2-bis(diphenylphosphinothioyl)ethane in chloroform–n-hexane gives the molecular adduct HgPh₂·Ph₂P(S)(CH₂)₂(S)PPh₂ which has been characterized by elemental analysis, i.r., u.v., ¹H n.m.r. spectroscopy and X-ray crystallography. The crystals are triclinic, space group P, with unit-cell dimensions a= 9.532(3), b= 10.065(2), c= 10.113(3)Å, α= 118.07(4), β= 96.29(3), and γ= 94.41(2)°. The angle C(1)–Hg–C(1′) is 180(–)°, while C(1)–Hg–S(1) and C(1′)–Hg–S(1) are 92.0(2) and 88.0(2)° respectively. The Hg ⋯ S(1) and Hg ⋯ S(1′) distances of 3.913(4)Å indicate very weak interaction.