Oxamido‐bridged N4 Macrocyclic Complexes CuII/MII/CuII (M = Mn,Co): Synthesis,Crystal Structures and Magnetic Properties |
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| Authors: | Yan‐Hong Zhang Gui‐Ru Deng Qing‐Lun Wang Rui‐Hong Zhang Fan Yang Guang‐Ming Yang Prof. Dai‐Zheng Liao |
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| Affiliation: | 1. Department of Chemistry, Nankai University, Tianjin / 300071, P. R. China;2. Department of Chemistry, Medical College of Chinese People's Armed Police, Tianjin, P. R. China |
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| Abstract: | Two new oxamido‐bridged N4 macrocyclic complexes [(CuL)2Mn(C2H5OH)2](ClO4)2 · 2C2H5OH ( 1 ) and [(CuL)2Co‐(C2H5OH)2](ClO4)2 · 2C2H5OH ( 2 ) (H2L = 2,3‐dioxo‐5,6:14,15‐di‐benzo‐7,13‐diphenyl‐1,4,8,12‐tetraazacyclo‐pentadeca‐7,13‐diene) have been synthesized and structurally characterized by X‐ray crystallographic investigations. In the two complexes, all copper(II) ions adopt a slightly distorted square‐planar configuration and the central manganese(II) and cobalt(II) ions are set in a distorted octahedral coordination sphere, connected to the other CuL fragments through exo‐cis oxamido bridges. The analyses of the magnetic properties were carried out by means of the theoretical expression of the magnetic susceptibility deduced from the spin Hamiltonian ? = –2J?1?2, leading to J = –14.58 cm–1 for complex 1 and J = –26.95 cm–1 for complex 2 , respectively. |
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| Keywords: | Macrocycles Oxamido ligands X‐ray diffraction Magnetic properties |
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