X-ray diffraction study of the monoclinic modification of [Cu(NH3)4](ReO4)2 in the range 100-410 K

Abstract

The monoclinic modification of [Cu(NH3)4](ReO4)2 complex salt in the range 100-410 K is studied by single crystal X-ray diffraction. The crystallographic data for 300 K are as follows: a = 10.6123(3) A, b = 7.5443(2) A, c = 15.2261(4) A, β = 108.406(1)°, V = 1156.67(5) A3, space group Р21/n, Z = 4, dx = 3.623 g/cm3. The coordination environment of the Cu atom, being a distorted square formed by four nitrogen atoms with Cu–N of 1.997-2.018 A, is completed by the contacts with two oxygen atoms Cu…O of 2.472 A and 2.598 A. The comparative crystal chemical analysis with the triclinic modification of [Cu(NH3)4](ReO4)2 known in the literature is performed.