X-RAY STUDY OF [Cu(NH3)4](ReO4)2 - [Cu(NH3)2(m-ReO4)2]n TRANSFORMATION
S. A. Gromilov1,2, A. P. Tyutyunnik3, D. A. Piryazev1,2, P. E. Plyusnin1,2, S. V. Korenev1,2
1Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Novosibirsk National Research State University, Novosibirsk, Russia
3Institute of Solid State Chemistry, Urals Branch, Russian Academy of Sciences, Ekaterinburg, Russia
Keywords: медь, перренат, термолиз, рентгенофазовый анализ, рентгеноструктурный анализ, кристаллохимия, copper, perrhenate, thermolysis, powder X-ray diffraction analysis, single crystal X-ray diffraction analysis, crystal chemistry
Abstract
The X-ray in-situ study of [Cu(NH3)4](ReO4)2 complex salt is carried out on heating up to 500 K. The product obtained at this temperature is a new crystalline phase [Cu(NH3)2(m-ReO4)2] n with the following unit cell parameters: a = 14.7523(3) Å, b = 5.8559(1) Å, c = 5.6290(1) Å, b = 111.387(1)°, V = 452.799(2) Å3, space group C 2/ m , Z = 2, dx = 4.386 g/cm3. The coordination polyhedron of the Cu atom is a distorted octahedron formed by two nitrogen atoms (Cu-N 2.195 Å), and four oxygen atoms (Cu-О 2.306 Å). The structure consists of infinite [Cu(NH3)2(m-ReO4)2] n chains, the shortest N(H)…O distances between the chains being 2.82 Å.
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