Crystal and molecular structure of anhydrous copper(II) perchlorate

Abstract

The structure of the pale blue-green Cu(ClO₄)₂ obtained by sublimation has been determined from single-crystal X-ray diffraction data. The structure was refined in the monoclinic space group P2₁/c, Z= 2, a= 4.584(1), b= 8.326(2), c= 8.015(1)Å and β= 114.21(1)°R= 0.044 for 894 observed reflections. The copper has a distorted-octahedral environment with four equatorial oxygen atoms at short distances [1.96(1)Å] and two long Cu–O axial interactions [2.46(1)Å]. Perchlorate groups are bridging bidentate, and can be regarded as pseudo-tridentate, leading to a three-dimensional polymeric network of infinite cross-linked chains interacting through long Cu–O contacts.