<i>cis</i>–<i>trans</i>Isomerism among the Octahedral Diaquabis(optically active<i>C</i>-substituted ethylenediamine)nickel(II) Complexes and Their Thermal Reaction Products. An Explanation for a Variety in Colors and Stereochemistry of Lifschitz Complexes
作者:Yoshinori Ihara、Tomomi Sakino、Mieko Ishikawa、Takanori Koyata
DOI:10.1246/bcsj.70.3025
日期:1997.12
trans-diaquabis(diamine)nickel(II) complexes (trans-[Ni(diamine)2(H2O)2]X2) were investigated by means of TG/DTA and DSC, and high-temperature electronic spectrometry, where the diamine is an optically active diamine such as (1S,2S)-1,2-diphenyl-1,2-ethanediamine or (S)-4-methyl-1,2-pentanediamine, and X is Cl−, Br−, or NO3−. Several complexes were peculiarly transformed into cis-[NiX2(diamine)2] upon thermal
用TG/DTA和DSC研究了反式双(二胺)镍(II)配合物(反式-[Ni(二胺)2(H2O)2]X2)的固相热反应,以及高温电子学光谱法,其中二胺是光学活性二胺,例如 (1S,2S)-1,2-二苯基-1,2-乙二胺或 (S)-4-甲基-1,2-戊二胺,并且 X 是 Cl-, Br-,或NO3-。几种配合物在热脱水-氨基化时特殊地转化为顺式-[NiX2(二胺)2],然后在进一步加热时异构化为反式-[NiX2(二胺)2]。结果与配合物与相应的外消旋二胺的反应相反,后者经历了简单的脱水-阴离子化,保留了原始的反式构型。