Stabilization of the open-chain structure of D-galacturonic acid in a dimeric complex with oxovanadium(IV)
Stabilization of the open-chain structure of D-galacturonic acid in a dimeric complex with oxovanadium(IV)
复制标题
与氧钒 (IV) 形成的二聚复合物中 D-半乳糖醛酸的开链结构的稳定性
DOI：
10.1039/dt9900001997
复制
发表时间：
1990
期刊：
影响因子：
--
通讯作者：
H. Kozłowski
中科院分区：
文献类型：
--
作者：
M. Branca;G. Micera;D. Sanna;A. Dessì;H. Kozłowski
采用电子共振、电子核双共振和电子吸收等波谱方法研究了水溶液中二聚体voiv - d -半乳糖醛酸配合物的形成。该配合物的金属-金属距离约为5.0 a，这与众所周知的voiv -酒石酸盐二聚体非常相似。在这样的距离上容纳金属离子并拟合光谱数据的唯一方法是假设配体通过CO2 -， O(4) -和O(3) -， O(2) -供体集与金属离子配位，并采用开链结构，由二聚体络合物形成稳定。
The formation of a dimeric VOIV–D-galacturonic acid complex in aqueous solution has been studied by spectroscopic methods, namely e.s.r., electron nuclear double resonance, and electronic absorption. The complex exhibits properties consistent with a metal–metal distance of about 5.0 A, which is very similar to that found in the well known VOIV–tartrate dimers. The only way to accommodate the metal ions at such a distance and to fit the spectroscopic data is to assume that the ligand co-ordinates to the metal ion through the CO2–, O(4)– and O(3)–, O(2)– donor sets and adopts an open-chain structure which is stabilized by the dimer complex formation.