The synthesis of a range of zinc complexes based on ligands displaying an N2O2-framework with cyanoacrylate and/or malonate functionality is presented. Some complexes could be examined via X-ray diffraction on single crystals, giving interesting insights into the structures of these zinc compounds, some of them building coordination polymers. The zinc complexes are highly active in the catalytic conversion of propylene oxide with CO2 to afford propylene carbonate. The study of this class of complexes leads to reactivity trends showing that ligands with aromatic diamino linkers and malonate fragments display the highest catalytic activity under mild conditions.
本文展示了一系列基于具有
N2O2框架并带有
氰基丙烯酸酯和/或
苹果酸功能团的
配体的
锌配合物的合成。部分配合物通过单晶X射线衍射进行研究,提供了对这些
锌化合物结构的有趣见解,其中一些构成了配位聚合物。
锌配合物在催化
丙烯氧化物与
CO2反应生成
丙烯碳酸盐方面表现出高度活性。对这一类配合物的研究揭示了反应性趋势,显示带有芳香族二
氨基连接体和
苹果酸片段的
配体在温和条件下具有最高的催化活性。