Crystal structure of bis[(3-chloropyridine)mercury(I)] diperchlorate

Abstract

The crystal structure of the title compound, has been determined by single-crystal X-ray diffraction methods. The structure was solved by conventional heavy atom methods, and refined by block-diagonal least squares to R 0·114 for 625 independent visually observed reflections. Crystals are monoclinic, space group C2/m, a= 16·49 ± 0·02, b= 22·92 ± 0·04, c= 5·04 ± 0·01 Å, β= 92·4 ± 0·1°. There are four dimers per unit cell, the asymmetric unit being half a dimer. Hg–Hg is 2·487 Å, and is approximately axially co-ordinated by the ligand (Hg–N 2·21 Å, Hg–Hg–N 167·4°). There are two independent perchlorate ions in the cell.