Carboxy Ester Hydrolysis Promoted by a Dicopper(
<scp>II</scp>
) Macrocyclic Polyamine Complex with Hydroxypropyl Pendant Groups
作者:Jin Huang、Shu‐An Li、Dong‐Feng Li、De‐Xi Yang、Wei‐Yin Sun、Wen‐Xia Tang
DOI:10.1002/ejic.200300452
日期:2004.5
than that of the dinuclear CuII complex formed by a hexaaza macrocycle without pendants. The reason for the higher catalytic activity of the title complex is discussed. We found that the volume of nucleophile RO− can effect the hydrolysis of the carboxy ester, the nucleophilicity of RO− and the Lewis acidity of the metal macrocycle also affect the carboxy ester hydrolysis. (© Wiley-VCH Verlag GmbH & Co
一种双核 CuII 复合物,含有带有两个 2-羟丙基侧链的六氮杂大环配体,3,6,9,16,19,22-六氮杂-6,19-双(2-羟丙基)三环 [22.2.2.211,14] 三环 [22.2.2.211,14]合成了 1,11,13,24,27,29-己烯 (L)。标题络合物[Cu2(H−2L)Cl2]·6.5H2O被分离为蓝色晶体,斜方晶系,空间群Fddd,a = 16.4581(12), b = 32.248(2), c = 35.830(2) A , V = 19017(2) A3, Z = 16, R1 = 0.0690, and wR2 = 0.1546 [I > 2σ(I)]。Cu2L 的质子化常数通过电位滴定法测定,发现配合物 Cu2L 的醇羟丙基在 25°C 下表现出低 pKa 值,pKa1 = 7.31,pKa2 = 7.83。还研究了标题配合物促进的 4-硝基苯乙酸酯