Copper(II) complexes with imidazol-4-yl derivatives of 2-imidazoline nitroxides |
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| Institution: | 1. Novosibirsk State University, Pirogova Str. 2, 630090 Novosibirsk, Russia;2. International Tomography Center, Russian Academy of Sciences, Institutskaya Str. 3A, 630090 Novosibirsk, Russia;1. College of Chemistry and Environmental Science, Hebei University, Baoding 071002, PR China;2. Key Laboratory of Medicinal Chemistry and Molecular Diagnosis (Ministry of Education), Hebei University, Baoding 071002, PR China;3. Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, PR China;1. Department of Chemistry, Brandon University, Brandon, Manitoba R7A 6A9, Canada;2. Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada;3. Department of Chemistry “Ugo Schiff” and INSTM Research Unit of Florence, University of Florence, Sesto Fiorentino, Italy;4. Department of Applied Science and Technology, “Guglielmo Marconi” University, via Plinio 44, 00193 Roma, Italy |
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| Abstract: | Cu(hfac)2LH, Cu(hfac)2L1H, Cu(hfac)(CF3COO)LH, Cu(LH)2(NO3)2, and Cu(L1H)2(NO3)2, where LH and L1H are nitronyl- and iminonitroxides, respectively, containing an imidazol-4-yl substituent in the side chain have been synthesized. In the solid state, the molecules are linked by intermolecular N H⋯O hydrogen bonds, leading to the formation of dimers, bands, or polymer layers. The antiferromagnetic exchange interactions between the odd electrons of the paramagnetic centers are concentrated in the Cu(II)-coordinated nitroxide exchange clusters. The energies of these interactions are between −154 and −350 cm−1. |
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