Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Akad. Lavrentiev Ave., 630090 Novosibirsk, Russia.
Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, 634034 Tomsk, Russia.
Molecules. 2023 Jun 22;28(13):4912. doi: 10.3390/molecules28134912.
The reactions between catechol (Hcat) and niobium(V) or tantalum(V) precursors in basic aqueous solutions lead to the formation of catecholate complexes of different natures. The following complexes were isolated and characterized by single-crystal X-ray diffraction (SCXRD): () (NH)[NbO(cat)]∙4HO; () K[Nb(cat)(Hcat)]·2Hcat·2HO; () Cs[NbO(cat)]·HO; () (NH)[TaO(cat)]·3HO; () Cs[Ta(cat)(Hcat)]·Hcat; () Cs[TaO(cat)]·7HO. The isolated crystalline products were characterized by elemental analysis, X-ray powder diffraction (XRPD), FTIR, and TGA. The structural features of these complexes, such as {TaO} unit geometry, Cs-π interactions, and crystal packing effects, are discussed.
儿茶酚（Hcat）与铌（V）或钽（V）前体在碱性水溶液中的反应导致形成不同性质的儿茶酸盐配合物。通过单晶 X 射线衍射（SCXRD）分离和表征了以下配合物：() (NH)[NbO(cat)]∙4HO；() K[Nb(cat)(Hcat)]·2Hcat·2HO；() Cs[NbO(cat)]·HO；() (NH)[TaO(cat)]·3HO；() Cs[Ta(cat)(Hcat)]·Hcat；() Cs[TaO(cat)]·7HO。通过元素分析、X 射线粉末衍射（XRPD）、FTIR 和 TGA 对分离出的结晶产物进行了表征。讨论了这些配合物的结构特征，如{TaO}单元几何形状、Cs-π 相互作用和晶体堆积效应。
