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From Dinuclear to Mononuclear: Co(II) Complexes with Pyridine-2,6-Dicarboxylic Acid (H2PDA) |
WANG Jiang-Yun;WANG Wen-Zhen;LIU Xin;LIAO Dai-Zheng;JIANG Zong-Hui;YAN Shi-Ping;WANG Geng-Lin |
Weifang Medical University, Weifang 261053, China |
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Abstract Reactions of pyridine-2,6-dicarboxylic acid (H2PDA) with cobalt(II) acetate resulted in two cobalt(II) complexes, [Co(HPDA)2]·2H2O·0.5CH3OH (1) and [Co2(PDA)2(H2O)5]·2H2O(2), which were characterized by single-crystal X-ray diffraction, IR and electronic absorption spectra. For both complexes, every cobalt atom lies in peudo-octahedral coordination geometry, and the whole structures present 3D frameworks linked by π-π stacking interactions and extensive hydrogen bonds. Magnetic studies showed λ = –83.38 cm-1 for (1) and g = 2.50 and J = –1.38 cm-1 for (2).
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Received: 05 April 2011
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Corresponding Authors:
WANG Jiang-Yun
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