Crystal structure of copper(II) cimetidine sulphate nonahydrate. Cation distortion and structure isomerism in three copper(II) cimetidine complexes |
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| Institution: | 1. The Key Laboratory of Digital Flavour Research of Hunan China Tobacco Industry Co., Ltd, 410083, PR China;2. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China;3. Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha 410083, Hunan, PR China;1. Department of Chemistry, Institute of Integrated and Honors Studies, Kurukshetra University, Kurukshetra 136119, India;2. Department of Chemistry, Daulat Ram College, University of Delhi, Delhi 110007, India;3. Department of Chemistry & Biochemistry and Centre for Nanoscience, University of Missouri-St. Louis, One University Boulevard, St. Louis, MO 63121-4499, USA;4. Department of Physics, National Institute of Technology, Kurukshetra 136119, India;5. Department of Chemistry, Panjab University, Chandigarh 160014, India |
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| Abstract: | In the crystalline state, the complex Cu(CM)2]SO4·9H2O (CM = cimetidine) is constituted of two-dimensional cationsCu(CM)22+]n separated by SO42− anions and water molecules. As in the related complexes Cu(CM)2](ClO4)2 and Cu(CM)2](NO3)2, the copper atom lies in a strongly distorted octahedral CuN4S2 environment. The distortion is quite different from one complex to another (cation distortion isomerism). In the title compound the CuS bond is unusually long (2.91 Å). Unlike the title compound, the Cu(CM)22+]n cations in the perchlorate and nitrate salts are one-dimensional infinite chains characterized by different conformations of the cimetidine molecules (cation structure isomerism). |
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