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Activation of the Cyano Group at Imidazole via Copper Stimulated Alcoholysis. INORGANICS 2019. [DOI: 10.3390/inorganics7070087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Reactions of 4,5-dicyano-1-methylimidazole with CuX2 (X = Cl, Br) in alcohol solvents (ethanol and methanol) resulted in the formation of Cu(II) carboximidate complexes [CuCl2(5- cyano-4-C(OEt)N-1-methylimidazole)(EtOH)] (1), [Cu2(µ-Cl)2Cl2(5-cyano-4-C(OMe)N-1-methylimidazole)2] (2), [Cu2(µ-Br)2Br2(5-cyano-4-C(OMe)N-1-methylimidazole)2] (3), and [Cu2(µ-Br)2Br2(5-cyano-4-C(OEt)N-1-methylimidazole)2] (4). The structures were determined by the X-ray crystallographic method, and further spectroscopic and computational methods were employed to explain the structural features. The solvent contributed to the alcoholysis reaction of the cyano group, as the result of which the ligand coordinated to the metal center in bidentate mode forming a five-membered chelating ring. In 1, the solvent also acts as an additional ligand, which coordinates to the metal center of a monomeric complex. In compounds 2–4, two halogen ligands link the metal atoms forming dihalo-bridged copper dimers. The infrared absorption characteristics were verified by simulation of the infrared spectra at the density functional theory level. In addition, the electronic absorption characteristics were explained by simulation of the UV–Vis spectra using the TD-DFT method. Molecular modelling at the DFT level was performed to study the effects of halogen type and steric hindrance of the alkoxy groups in forming the copper(II) complexes.
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Affiliation(s)
- Kyungkyou Noh
- Department of Information Communication; Materials, and Chemistry Convergence Technology; Soongsil University; 369 Sangdo-Ro, Dongjak-Gu Seoul 06978 Republic of Korea
| | - Jisu Lee
- Department of Chemistry; Soongsil University; 369 Sangdo-Ro, Dongjak-Gu Seoul 06978 Republic of Korea
| | - Jaheon Kim
- Department of Information Communication; Materials, and Chemistry Convergence Technology; Soongsil University; 369 Sangdo-Ro, Dongjak-Gu Seoul 06978 Republic of Korea
- Department of Chemistry; Soongsil University; 369 Sangdo-Ro, Dongjak-Gu Seoul 06978 Republic of Korea
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Wang Y, Li C. 3D porous Mn(II) coordination polymer with left-handed 41 helical chains as building subunits: Selective gas adsorption of CO2 over CH4 and anticancer activity evaluation. INORG CHEM COMMUN 2018. [DOI: 10.1016/j.inoche.2018.08.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Synthesis, structure and proton conductivity of a metal–organic framework with rich hydrogen-bonds between the layers. INORG CHEM COMMUN 2017. [DOI: 10.1016/j.inoche.2017.03.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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