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采用水热法合成了一种新型双核铅(Ⅱ)配合物[Pb2(CA)4(Medpq)2](HCA=cinnamic acid,Medpq=2-methyldipyrido[3,2-f∶2,3′-h]quinoxaline),并对其进行了元素分析、红外光谱、紫外可见光光谱、热重表征、荧光光谱、X射线单晶衍射测定和理论计算。标题配合物属于三斜晶系,空间群为P1。在晶体中,铅与来自Medpq配体的2个氮原子和3个肉桂酸配体的5个氧原子形成七配位。应用Gaussian 03程序,对标题配合物进行了自然键轨道(NBO)分析,结果表明Pb(Ⅱ)与配位原子间的价键类型都属于共价键范畴。
A novel dinuclear lead (Ⅱ) complex [Pb2 (CA) 4 (Medpq) 2] (HCA = cinnamic acid, Medpq = 2-methyldipyrido [3,2-f: h] quinoxaline were synthesized and characterized by elemental analysis, IR, UV-Vis, TG, fluorescence spectroscopy, X-ray single crystal diffraction and theoretical calculations. The title complex belongs to triclinic system with space group P1. In crystals, lead forms hepta coordinate with 5 oxygen atoms from 2 nitrogen atoms of Medpq ligand and 3 cinnamic acid ligands. The Gaussian 03 program was used to conduct the natural bond orbital (NBO) analysis of the title complex. The results showed that the valence bond types between Pb (Ⅱ) and the coordination atom belong to the covalent bond category.