The Crystal Structure of 1-(2-Thiazolylazo)-2-naphtholato diaquacopper(II) Perchlorate

Abstract

Abstract The crystal structure of 1-(2-thiazolylazo)-2-naphtholatodiaquacopper(II) perchlorate, [CuII(TAN)(H2O)2]-ClO4, has been determined from three-dimensional X-ray data collected by counter methods. The crystals are monoclinic, with the space group P21/c; a=13.481(4), b=8.060(4), c=15.307(7) Å, β=95.58(4)°, and Z=4. The structure was refined to an R value of 0.086 for 952 non-zero reflections. The copper atom is five-coordinated and has a distorted square-pyramidal environment. The 1-(2-thiazolylazo)-2-naphtholato group (TAN) acts as a terdentate ligand, the phenolic oxygen, the azo nitrogen and the thiazole nitrogen atoms being coordinated to the copper atom to give two five-membered chelate rings. The remaining two positions are occupied by water molecules.