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Copper(II), nickel(II) and cobalt(II) complexes of 4-cyanobenzonic acid: syntheses, crystal structures and spectral properties |
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| Authors: | Fa-Kun Zheng A-Qing Wu Yan Li Guo-Cong Guo Ming-Sheng Wang Qiang Li Jin-Shun Huang |
| Institution: | aState Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Yangqiao West Road 155, Fuzhou, Fujian 350002, People's Republic of China bGraduate School, The Chinese Academy of Sciences, Beijing 100039, People's Republic of China |
| Abstract: | Three new metal complexes, Cu(4-Hcba)2(4-cba)2(Py)2 (4-Hcba=4-cyanobenzoic acid) 1 and MH(4-cba)2]2(Py)2 (M=Ni 2, Co 3), have been prepared by the treatment of 4-Hcba with the respective metal nitrate M(NO3)2 (M=Cu, Ni, Co) in the presence of pyridine (Py). Single-crystal X-ray diffraction analyses (3 is isostructural to 2) show that the obtained complexes are of isolated mononuclear and the metal atoms have distorted octahedral coordination environment. Two different types of intramolecular hydrogen bonds exist: asymmetrical O–H O for 1 and symmetrical OHO for 2 and 3. The crystal packing between the molecular complexes is controlled mainly by T-shaped C–Hπ interactions between pyridine and phenyl rings. Preliminary discussions on IR, UV–VIS and fluorescent spectra have also been carried out. |
| Keywords: | 4-Cyanobenzoic acid Metal complex Hydrogen bond Crystal structure Spectral properties |
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