The single‐crystal structures of calcium d‐gluconate and calcium α‐d‐isosaccharinate have been determined using X‐ray diffraction at 100 K. Surprisingly, given its significance in industrial and medical applications, the structure of calc...
http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
https://www.riss.kr/link?id=O116337969
V. Bugris ; Cs. Dudás ; B. Kutus ; V. Harmat ; K. Csankó ; S. Brockhauser ; I. Pálinkó ; Peter Turner ; P. Sipos
2018년
-
2052-5192
2052-5206
SCI;SCIE
학술저널
598-609 [※수록면이 p5 이하이면, Review, Columns, Editor's Note, Abstract 등일 경우가 있습니다.]
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
The single‐crystal structures of calcium d‐gluconate and calcium α‐d‐isosaccharinate have been determined using X‐ray diffraction at 100 K. Surprisingly, given its significance in industrial and medical applications, the structure of calc...
The single‐crystal structures of calcium d‐gluconate and calcium α‐d‐isosaccharinate have been determined using X‐ray diffraction at 100 K. Surprisingly, given its significance in industrial and medical applications, the structure of calcium d‐gluconate has not previously been reported. Unexpectedly, the gluconate crystal structure comprises coordination polymers. Unusually, the calcium coordination number is nine. Adjacent metal centres are linked by three μ‐oxo bridges, with a metal–metal separation of 3.7312 (2) Å. One of the gluconate ligands contradicts a suggestion from 1974 that a straight chain conformation is associated with an intramolecular hydrogen bond. This ligand binds to three adjacent metal centres. The use of synchrotron radiation provided an improved crystal structure with respect to that previously reported for the isosaccharinate complex, allowing the location of the hydroxy hydrogen sites to be elucidated. In contrast to the gluconate structure, there are no μ‐oxo bridges in the isosaccharinate coordination polymer and the isosaccharinate bridging coordination is such that the distance between adjacent metal centres, each of which is eight‐coordinate, is 6.7573 (4) Å. Complementing the crystal structure determinations, modelling studies of the geometries and coordination modes for the aqueous [CaGluc]+ and [CaIsa]+ complexes are presented and discussed.
The crystal structures of calcium d‐gluconate and calcium α‐d‐isosaccharinate nave been determined, the latter using a synchrotron source, and found to be coordination polymers. Computational studies complement the structure determinations.
Triamterene–furosemide salt: structural aspects and physicochemical evaluation
A priori bond‐valence and bond‐length calculations in rock‐forming minerals