Not So Similar: Different Ways of Nb(V) and Ta(V) Catecholate Complexation

被引：3
|
作者：
Abramov, Pavel A. A. [1 ,2 ]
Sokolov, Maxim N. N. [1 ]
机构：
[1] SB RAS, Nikolaev Inst Inorgan Chem, 3 Akad Lavrentiev Ave, Novosibirsk 630090, Russia
[2] Tomsk Polytech Univ, Res Sch Chem & Appl Biomed Sci, Tomsk 634034, Russia
来源：
MOLECULES | 2023年 / 28卷 / 13期
关键词：
catechol; niobium; tantalum; crystal structures; REDOX-ACTIVE LIGANDS; CRYSTAL-STRUCTURE; PEROXO COMPLEXES; NIOBIUM; NB; METAL; OXIDATION; COMPOUND; CATIONS; DI;
D O I：
10.3390/molecules28134912
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The reactions between catechol (H(2)cat) 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): (1) (NH4)(3)[NbO(cat)(3)]& BULL;4H(2)O; (2) K-2[Nb(cat)(3)(Hcat)]& BULL;2H(2)cat & BULL;2H(2)O; (3) Cs-3[NbO(cat)(3)]& BULL;H2O; (4) (NH4)(4)[Ta2O(cat)(6)]& BULL;3H(2)O; (5) Cs-2[Ta(cat)(3)(Hcat)]& BULL;H(2)cat; (6) Cs-4[Ta2O(cat)(6)]& BULL;7H(2)O. 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 {Ta2O} unit geometry, Cs-& pi; interactions, and crystal packing effects, are discussed.
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页数：12
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