Copper(II) Complexes of Spirohydantoins. Synthesis,Quantum-Chemical,and Spectroscopic Study |
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| Authors: | Enchev Venelin Stoyanov Neyko Mateva Veska Popova Julita Kashchieva Margarita Aleksiev Boris Mitewa Mariana |
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| Affiliation: | (1) Bulgarian Academy of Sciences, Institute of Organic Chemistry, 1113 Sofia, Bulgaria;(2) College of Technology, 7200 Razgrad, Bulgaria;(3) Department of Organic Chemistry, Chemical Technology and Metallurgy University, 8 Kl. Okhridski boul., 1756 Sofia, Bulgaria;(4) Department of Chemistry, Episcop K. Preslavsky University Shoumen, 9700 Shoumen, Bulgaria;(5) Department of Chemistry, University of Sofia, 1 J. Bourchier boul., 1126 Sofia, Bulgaria |
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| Abstract: | A series of new Cu(II) complexes with important physiologically active cycloalkane-5-spirohydantoines are synthesized reacting as a result of CuCl2 · 2H2O interaction with the ligands in alkaline water medium. Their structures were studied using spectroscopic (IR and EPR) methods. For comparison, ab initio calculations of the structure and IR spectra of the corresponding Cu(II) complexes were also performed. It was proven that with cyclopentane-5-spirohydantoins, distorted (flattened) tetrahedral structure is realized Cu(L–H)2(H2O)2, while with the higher cycloalkane-5-spirohydantoins linear Cu(II) complexes of the type CuL–H(OH) are formed. |
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| Keywords: | Hydantoins Cu(II) complexes IR EPR ab initio MO calculations |
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