Syntheses and structures of two rhenium-sulfur-copper cubane-like cluster compounds with the bridging sulfate anions

Treatment of [Et4N][ReS4] with three equivalents of CuSO4 center dot 5H(2)O in the presence of three equivalents PPh3 gave a tetranuclear cubane-like cluster compound [(mu(3)-SO4)(mu(3)-ReS4)Cu-3(PPh3)(3)]center dot 2dmf(1 center dot 2dmf) in which a ReS4Cu3 core is capped by a mu(3)-SO42 moiety, leaving a S=O double bond. A similar reaction of [Et4N][ReS4] with three equivalents of CuSO4 center dot 5H(2)O in the presence of two equivalents of PPh3 gave rise to isolation of a neutral one-dimensional polymeric cubane-like cluster compound [(mu(4)-SO4)(mu(3)-ReOS3)Cu-3(PPh3)(2)](n) (2) in which the ReOS3Cu3 cores are bridged by the mu(4)-SO42 anions. Both cluster compounds were characterized by single-crystal X-ray diffraction along with the spectroscopic methods. (C) 2014 Published by Elsevier B.V.