Abstract
Two new non-centrosymmetric copper sulfates are synthesized under slow evaporation conditions through the use of enantiomorphically pure sources of either (R)-2-methylpiperazine or (S)-2-methylpiperazine. Both crystallize in the non-centrosymmetric P21 space group, crystal data for [(R)-C5H14N2][Cu(H2O)6](SO4)2 (I), a = 6.5276(2) Å, b = 11.1955(3) Å, c = 12.4559(4) Å, β = 101.196(2)°, Z = 2, V = 892.95(5) Å3 and [(S)-C5H14N2][Cu(H2O)6](SO4)2 (II), a = 6.5188(2) Å, b = 11.1786(2) Å, c = 12.4365(3) Å, β = 101.205(1)°, Z = 2, V = 888.99(4) Å3. The three-dimensional structure networks for these compounds consist of isolated [Cu(H2O)6]2+ and [(R)-C5H14N2]2+ or [(S)-C5H14N2]2+ cations and SO 2−4 anions linked only by hydrogen bonds. The Cu atom is in a slightly distorted octahedral coordination environment. The crystal packings are influenced by cation-to-anion N-H…O and OW-H…O hydrogen bonds leading to an open framework structures.
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Original Russian Text Copyright © 2012 by F. Hajlaoui, H. Naïli, S. Yahyaoui, T. Mhiri, T. Bataille
The text was submitted by the authors in English. Zhurnal Strukturnoi Khimii, Vol. 53, No. 2, pp. 335–341, March–April, 2012.
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Hajlaoui, F., Naïli, H., Yahyaoui, S. et al. Crystal structures of two enantiomorphous 2-ethylpiperazinediium hexaaquacopper sulfates [(R or S)-C5H14N2][Cu(H2O)6](SO4)2 . J Struct Chem 53, 334–340 (2012). https://doi.org/10.1134/S0022476612020187
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DOI: https://doi.org/10.1134/S0022476612020187