Dinuclear helicate-type complexes form from 3-carbonyl catechol derivatives and MoO2 units. The two monomeric subunits are non-covalently bound through templating Li+ ions. The monomeric and dimeric complexes as well as a hydrolysis product have been investigated in the solid state by X-ray crystallography, in solution by NMR experiments, and in the gas phase by ESI mass spectrometry. Dimerization constants can easily be extracted from NMR experiments. A particular property of these complexes is the mutual homochiral recognition between the two halves of the dimers which only occurs between homochiral monomers.
双核螺旋型复合物由 3-羰基
邻苯二酚衍
生物和
MoO2 单元形成。两个单体亚基通过模板化的 Li+ 离子进行非共价结合。我们通过 X 射线晶体学对单体和二聚复合物以及
水解产物进行了固态研究,通过核磁共振实验对溶液中的单体和二聚复合物进行了研究,通过 ESI 质谱法对气相中的单体和二聚复合物进行了研究。二聚常数很容易从核磁共振实验中提取出来。这些复合物的一个特殊性质是两半二聚体之间的相互同手性识别,而这种识别只发生在同手性单体之间。