Crystal and molecular structures of nickel(II) and zinc(II) bis(trithioperoxybenzoates)

Abstract

The crystal and molecular structures of nickel(II) and zinc(II) bis(trithioperoxybenzoates) have been determined and refined by anisotropic least-squares methods to final R values of 0·071 and 0·087 respectively for 1097 and 1346 independent observed reflections. Although the two structures are very similar, the metal co-ordination is different: planar in the nickel and tetrahedral in the zinc complex. The shortening of the Ni–S but not of the Zn–S bond lengths compared to those in other sulphur-containing complexes is discussed. Five-membered chelate rings are tilted by 33–40° with respect to the phenyl rings. The nickel complex crystallises in space group P2₁/c with Z= 2 in a unit cell of dimensions a= 10·548 ± 0·01, b= 3·983 ± 0·001, c= 20·435 ± 0·01 Å, and β= 111° 18′± 5′. The zinc complex crystallises in space group C2/c with Z= 4 in a unit cell of dimensions: a= 20·654 ± 0·01, b= 4·078 ± 0·01, c= 21·303 ± 0·01 Å, β= 112° 30′± 5′.