Molecular ribbons composed of calcium(II) ions bridged by carboxylate and water oxygen atoms in the crystals of Ca(II) complex with 5-methylpyrazine-2-carboxylate ligands

被引：7

作者：

Ptasiewicz-Bak, H ^{[1
]}

Leciejewicz, J ^{[1
]}

机构：

[1] Inst Nucl Chem & Technol, PL-03195 Warsaw, Poland

来源：

JOURNAL OF COORDINATION CHEMISTRY | 2000年 / 49卷 / 04期

关键词：

5-methylpyrazine-2-carboxylic acid; calcium complex; X-ray structure analysis;

D O I：

10.1080/00958970008022240

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Crystals of monoaquo(-5-methylpyrazine-2-carboxyl ylato-N,O)di(mu-aquo-O,O)calcium(II) contain molecular ribbons in which two adjacent calcium(II) ions are bridged by two bidentate oxygen atoms donated by two ligand molecules on one side and bidentate oxygen atoms of two water molecules on the other. The coordination polyhedron around the Ca(II) ion is a pentagonal bipyramid. The vertices of its pentagonal base are composed of two bridging water oxygen atoms, two carboxy]ate oxygen atoms of two ligand molecules and a nitrogen atom belonging to one of the bridging ligands. A coordinated water molecule constitutes the apex of the pyramid on one side of the base, while the N,O bonding moiety of a second ligand molecule makes two apices on the other side of the base. The ribbons are held together by a system of hydrogen bonds.

引用

页码：301 / 308

页数：8