Metal complexes with macrocyclic ligands. Part XIX. Synthesis and Cu2+-complexes of a series of 12-, 14- and 16-memberedcis- andtrans-N2S2-macrocycles
作者:Liselotte Siegfried、Thomas A. Kaden
DOI:10.1002/hlca.19840670105
日期:1984.2.1
N2S2-macrocycles (9–11 and 19–21) with cis and trans-arrangement of the heteroatoms have been synthesized by high-dilution cyclization and subsequent reduction of the amides with B2H6. With these ligands the corresponding Cu2+-complexes were prepared and their UV/VIS spectra, their electrochemistry and their EPR properties have been studied. Generally three absorption bands at 270–320 nm, 330–370 nm
通过高稀释环化反应和随后的还原反应,合成了一系列12、14和16元N 2 S 2-大环(9-11和19-21),具有杂原子的顺式和反式排列。酰胺与B 2 H 6。用这些配体制备了相应的Cu 2+配合物,并研究了它们的UV / VIS光谱,电化学和EPR性能。通常在水溶液中可以观察到在270–320 nm,330–370 nm和530–620 nm处的三个吸收带,这些吸收带已分配给NCu 2+和SCu 2+电荷转移带和到dd *跃迁。在所有情况下,CH 3 CN中的循环伏安法均显示在针对SHE的电位为10-480 mV时可逆或准可逆Cu 2+ / Cu +-转变。从EPR光谱获得的g ′和A ′值表明,14元顺式-N 2 S 2-大环的Cu 2 + -配合物的几何形状比其他配合物的畸变少。