Two-Dimensional Supramolecular from the Self-Assembly of Dissymmetrical Oxamidato-Bridged Heterometallic Trinuclear Building Blocks: Synthesis, Crystal Structure, and Magnetic Properties |
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Authors: | Ruojie Tao Shuangquan Zang Chongzhen Mei Qinglun Wang Benyong Lou Jingyang Niu Yanxiang Cheng Daizheng Liao |
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Institution: | (1) Chemistry and Chemical Engineering College of Henan University, Kaifeng, 475001, People's Republic of China;(2) Department of Chemistry, Nankai University, Tianjin, 300071, People's Republic of China;(3) Changchun Institute of Applied Chemistry Chinese Academy of Sciences, Changchun, 130022, People's Republic of China |
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Abstract: | Two heterometallic trinuclear complexes {Cu(oxbp)]2Co(H2O)2}1.5DMF0.5H2O (complex 1) and {Cu(oxbm)]2Co(H2O)2}2DMF (complex 2) were obtained from the self-organization of two new dissymmetrical oxamidato-bridged copper(II) building blocks Cu(oxbp)]– and Cu(oxbm)]–H3oxbp=N-benzoato-N'-(3-aminopropyl)oxamido, H3oxbm=N-benzoato-N'-(2-amino-2-methylethyl)oxamido, DMF=dimethylformamide]. The crystal structure of complex 1 has been determined. Complex 1 crystallize in triclinic system, space group P-1, a=8.0609(16) Å, b=10.661(2) Å, c=22.279(5) Å, =85.32(3), =86.64(3), =70.90(3), and Z=1. The crystal structure of complex 1 consists of neutral trinuclear complex units, and hydrogen bond involved DMF and water molecules. Through the hydrogen bonds, weak coordination and CuCu weak interactions, complex 1 features a 2-D supramolecular structure. Magnetic susceptibility measurements (5–100 K) indicate that the central Co(II) and terminal copper metal ions are antiferromagnetically coupled with J=–28.09 and J=–29.70 cm–1 for complex 1 and 2, respectively. |
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Keywords: | dissymmetrical oxamidato-bridged trinuclear complexes copper(II) cobalt(II) self-organization 2-D supramolecular structure |
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