Unprecedented bridging mode of the triethylphosphine–carbon disulphide adduct PEt3·CS2. X-Ray crystal structure of the binuclear silver(I) complex [{Ag(S2CPEt3)(µ-S2CPEt3)}2][ClO4]2

Abstract

The binuclear complex [{Ag(S₂CPEt₃)₂}₂][ClO₄]₂ has been synthesized by reaction of the zwitterion PEt₃·CS₂ with AgClO₄·H₂O. The crystal and molecular structure of this silver(I) complex has been determined by standard X-ray methods. The compound is triclinic, space group P, with unit-cell parameters a= 13.378(8), b= 13.562(8), c= 7.617(5)Å, α= 80.38(4), β= 85.60(4), γ= 67.44(4)°, and Z= 1. Full-matrix least-squares refinement using 3 492 reflections having I 3σ(I) yielded a conventional R factor of 0.058. The structure consists of centrosymmetric binuclear complexes, where the two metal centres are held together by two triethylphosphine–carbon disulphide adducts. Each silver atom displays a very distorted tetrahedral geometry, the S–Ag–S bond angles ranging from 65.5(1) to 136.5(1)° and the Ag–S bond distances ranging from 2.468(2) to 2.812(2)Å.