respectively, and these pairs of isomers are proposed to be conformational isomers. Solid state thermal investigation of the complexes has been carried out. The complexes show thermochromism due to deaquation–anation/deaquation reaction/change of conformation. Only [NiL2](ClO4)2, [NiL′2(CF3CO2)2] and [NiL″2(NO2)2] undergo thermally induced phase transition. The effect of flexible ring size on diamine has been
摘要
镍(II)盐与取代的
乙烷-1,2-二胺的反应,其中胺的一个氮原子为柔性环的一部分,例如1-(2-
氨基乙基)
哌啶(L),1-(2-
氨基乙基)
吡咯烷(L')和4-(2-
氨基乙基)吗啉(L'')产生许多类型的配合物:(i)Ni(AA)2X2(其中X = CF3CO2--,SCN-和
NO2 −;AA代表L / L'/ L''); (ii)Ni(A = A)2(CH3CN)2X2(X =
ClO4-和
NO3--);(iii)Ni(A = A)2(
H2O)2X2(X = CF3SO3--,Cl-,Br-和I-);(iv)Ni(A = A)2(H 2 O)4 X 2(X = 0.5SO 4 2-,0.5SeO 4 2-和CF 3 SO 3-)。配合物具有八面体的几何形状。去溶剂化后的主要络合物保留反式几何结构,其中一些相对于抗衡阴离子是顺式的,而一些则是正方形平面的。反式[Ni
L2(CH3CN)