single crystal X-ray analyses. In these constrained macrocycles, the central copper(II) atoms are in a tetragonally distorted octahedral environment with four nitrogen atoms of the macrocyclic ligands in equatorial positions and oxygen atoms from either water molecules or nitrato groups in axial positions. The macrocyclic ligands in both complexes adopt the most stable trans-III conformation. The Cu–N
配合物 [Cu(L1)(
H2O)2](
BF4)2·2 (1) [L1 = 5, 16-二甲基-2, 6, 13, 17-四氮杂
三环(14, 4, 01.18,07.12)docosane]和 0.5[Cu(
L2)(
NO3)2][Cu(
L2)]( )2 (2) [
L2 = dibenzyl-5, 16-dimethyl-2, 6, 13, 17-tetraazatricyclo(14, 4, 01.18,07.12)
二十二烷]被合成并通过单晶 X 射线分析表征。在这些受约束的大环中,中心
铜 (II) 原子处于四方扭曲八面体环境中,大环
配体的四个氮原子位于赤道位置,氧原子来自
水分子或硝基基团在轴向位置。两种复合物中的大环
配体均采用最稳定的反式 III 构象。Cu-N 距离 [1.999(7)–2.095(7) A] 是此类配合物的典型特征,但轴向
配体弱配位 Cu-OH2 键 [2.693(3)