The crystal and molecular structure of copper(II) 2-chloronicotinate (2-Clnic) of the composition [Cu(2-Clnic)₂(pia)₂] (pia = Picolinamide) (1), [Cu(2-Clnic)₂(nia)₂] (nia = Nicotinamide) (2), [Cu(2-Clnic)₂(nia)₂(H₂O)]·H₂O (3), [Cu(2-Clnic)₂(mna)₂(H₂O)₂] (mna = N-methylnicotinamide) (4), [Cu(2-Clnic)₂(2 pm)₂] (2 pm = 2-Pyridylmethanol) (5), and [Cu(2-Clnic)₂(4 pm)₂(H₂O)₂]·2H₂O (4 pm = 4-Pyridylmethanol) (6) were determined by single-crystal X-ray analysis. Crystal structures of the respective complexes are monomeric with a different composition of coordination sphere about Cu(II) atom. The arrangement about Cu(II) in all coordination compounds are pseudooctahedral trans-coordinated, where carboxylic groups are bidentate (2,3) or monodentate (1,3–6) coordinated to atom copper. The molecules of all compounds are connected by strong N–H···O, N–H···N and/or O–H···O hydrogen bonds. EPR spectra of powder complexes 1–6 were measured and computer-simulated.

中文翻译：

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2-choronicotinate铜（II）与吡啶啉酰胺，烟酰胺，N-甲基-烟酰胺，2-吡啶基甲醇和4-吡啶基甲醇的氢键超分子网络：Hirshfeld表面分析和光谱性质

组成为[Cu（2-Clnic）₂（pia）₂ ]（pia = Picolinamide）（1），[Cu（2-Clnic）的2-氯烟酸铜（II）（2-Clnic）的晶体和分子结构₂（nia）₂ ]（nia =烟酰胺）（2），[Cu（2-Clnic）₂（nia）₂（H ₂ O）]·H ₂ O（3），[Cu（2-Clnic）₂（ mna）₂（H ₂ O）₂ ]（mna =  N-甲基烟酰胺）（4），[Cu（2-Clnic）₂（2 pm）₂ ]（2 pm = 2-吡啶基甲醇）（5）和[Cu（2-Clnic）₂（4 pm）₂（H ₂ O）₂ ]·2H ₂ O（4 pm = 4-吡啶基甲醇）（6）通过单晶X射线分析确定。各个配合物的晶体结构是单体，关于Cu（II）原子的配位球组成不同。在所有配位化合物约铜的装置（II）是pseudooctahedral反配位的，其中羧酸基团是二齿（2，3）或单齿（1，3 - 6）与原子铜配位。所有化合物的分子均通过强N–H··O，NH–··N和/或O–H···O氢键连接。粉末的EPR谱络合物1 - 6进行测量和计算机模拟。