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Abstract:
The crystal structure of Cu+Re7+O4 is capable of a quasi-reversible
incorporation of C3H7OH molecules. A room-temperature reaction between
CuReO4 and C3H7OH under oxidizing conditions leads to the formation of a
novel metal-organic hybrid compound Cu2+(C3H7OH)(2)(ReO4)(2). Upon
heating under reducing conditions, this compound transforms back into
CuReO4, albeit with ReO2 and metallic Cu as by-products. The crystal
structure of Cu(C3H7OH)(2)(ReO4)(2) solved from single-crystal X-ray
diffraction (Pbca, a = 10.005 (3) angstrom, b = 7.833(2) angstrom, and c
= 19.180(5) angstrom) reveals layers of corner-sharing CuO6-octahedra
and ReO4-tetrahedra, whereas isopropyl groups are attached to both sides
of these layers, thus providing additional connections within the layers
through hydrogen bonds. Cu(C3H7OH)(2)(ReO4)(2) is paramagnetic down to 4
K because the spatial arrangement of the Cu2+ half-filled orbitals
prevents magnetic superexchange. The paramagnetic effective moment of
2.0(1) mu(B) is slightly above the spin-only value and typical for Cu2+
ions. (C) 2015 Published by Elsevier Inc.
