observed. The complexes of formula [Zn(L)][NO3]2(L = L1 or L2) were found to be single isomers which do not isomerise even at elevated temperatures. 13C N.m.r. studies show that in [Zn(L1)][NO3]2 the macrocycle is asymmetric whereas in [Zn(L2)][NO3]2 the macrocycle is in a symmetric configuration. The new, related macrocycle, 11-methyl-1,4,7,11-tetra-azacyclotetradecane, L3, and its complexes with Ni2+
Ni 2 +,Cu 2+和Zn 2+与两个紧密相关的侧臂五氮杂大环11-(2'-二甲基
氨基乙基)-
1,4,7,11-四氮杂环十四烷L 1的配合物,和7-(2'-二甲基
氨基乙基)-3,7,11,17-四
氮杂双环[11.3.1] heptadeca-1(17),13,15-
三烯L 2的光谱已表征。已经发现质子化的
配体L 1 [Ni(HL 1)] [ClO 4 ] 3的正方形平面络合物先前在两种异构体的混合物中被发现在热
水溶液中异构化,从而得到另外两种异构体。式[Ni(L 1)(
NCS)] ClO的六坐标
硫氰酸根络合物分离出4和[Ni(HL 1)(
NCS) 2 ] ClO 4。对于
配体(L 1)(但不是L 2)的质子化
铜( II)配合物,[Cu(L 1)] 2+ + H + ⇌[Cu(HL 1)]类型的温度依赖性平衡3+存在于
水溶液中,和可变温度可见光谱研究表明,在298.2 K, ķ =(2.2±0