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Crystal structure, thermal analyses, and acetate binding properties in Zinc(II) complex of a urea-functionalized pyridyl ligand
Indian Journal of Chemistry, Section A ( IF 0.412 ) Pub Date : 2019-12-18
Zaiwen Yang, Shasha Sun, Yilong Liu, Xiangrong Liu, Shunsheng Zhao, Zhen Zhang, Xinjuan Chen, Zheng Yang, Xiaodan Jia

A zinc(II) acetate complex with a urea-functionalized pyridyl ligand, [ZnL2(OAc)2]·2H2O (1) (L = N-(4-chlorophenyl)-N'-(4-pyridyl)urea), has been synthesized by the reaction of L with Zn(OAc)2·2H2O under water-containing condition. X-ray single-crystal diffraction analyses reveal that 2-D sheetlike network structure has been formed by the urea N−H×××Npyridyl interactions and C–H···O interactions in the free ligand L. Complex 1 features 3-D hydrogen bonded network formed by intermolecular N−H···O hydrogen bonds and O−H×××O hydrogen bonds involving urea groups, acetate anions and bridged water molecules. The hydrogen bonds play an important role in stabilizing the supramolecular structures. Thermal gravity analyses have been used to investigate the thermal stabilities of L and 1, and the apparent activation energy (Ea) of the decompositions have also been calculated, and the results indicate that the main decomposition of L needs higher apparent activation energy values Ea than that of 1. The acetate binding properties of L in solution have also been evaluated by Ultraviolet-Visible (UV-Vis) spectroscopy. CCDC: 1506202, L; 1506203, 1.

中文翻译:

脲官能化吡啶基配体的锌(II)配合物的晶体结构,热分析和乙酸酯键合性质

具有脲官能化吡啶基配体[ZnL 2(OAc)2 ]·2H 2 O(1)(L = N-(4-氯苯基)-N ' -(4-吡啶基)脲的乙酸锌(II)配合物)是通过L与Zn(OAc)2 ·2H 2 O在含水条件下反应合成的。X射线单晶衍射分析表明,游离配体L中的尿素N–H×××N吡啶基相互作用和C–H···O相互作用形成了二维片状网络结构。综合大楼1具有3D氢键网络,由分子间的NH···O氢键和OH×××O氢键构成,涉及尿素基团,乙酸根阴离子和桥连的水分子。氢键在稳定超分子结构中起重要作用。用热引力分析法研究了L1的热稳定性,并计算了分解的表观活化能(E a),结果表明L的主要分解需要更高的表观活化能值E一个比的1L的乙酸盐结合特性还通过紫外-可见(UV-Vis)光谱法评估了溶液中的溶出度。CCDC:1506202,L;1506203,1
更新日期:2019-12-18
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