solvent by means of UV–Vis spectrophotometeric analysis. Adducts have been characterized by 1H NMR, IR and electronic spectroscopy. The formation constants and the thermodynamic free energies were measured using UV–Vis spectrophotometry titration for 1:1 adduct formation at various temperatures (T = 278–308 K). The trend of the adduct formation of the nickel Schiff base complexes with a given tin acceptor
摘要R2SnCl2(R =甲基和正丁基)受体与四齿席夫碱
配体([NiL])的
镍(II)配合物之间的加合物形成,其中L = [3-甲氧基salen,N,N'-bis(3-甲氧基
水杨基亚乙基二胺],[4-甲氧基
水杨烯基,N,N'-双(4-甲氧基
水杨亚基)
乙二胺],[5-甲氧
水杨基,N,N'-双(5-甲氧
水杨基亚乙基)
乙二胺],[salen,N,N'已研究了作为供体的-双(
水杨基醛基
乙二胺),[5-
氯水杨酸,N,N'-双(5-
氯水杨基)
乙二胺]和[5-
溴水杨烯,N,N'-双(5-
溴水杨基)
乙二胺]通过紫外可见分光光度计分析,以
氯仿为溶剂。加合物已通过1 H NMR,IR和电子光谱表征。使用UV-Vis分光光度法滴定法测量形成常数和热力学自由能:在不同温度下(T = 278–308 K)形成1个加合物。具有给定
锡受体的
镍席夫碱复合物的加合物形成趋势按以下方式降低:Ni(3 -MeOSalen)> Ni(5