(μ-Di-hydrogen pyrazine-2,3,5,6-tetra-carboxyl-ato-κ(6) O (2),N (1),O (6);O (3),N (4),O (5))bis-(di-aqua-lithium) monohydrate.

Wojciech Starosta,Janusz Leciejewicz

doi:10.1107/s1600536814007223

Abstract

The structure of the title compound, [Li2(C8H2N2O8)(H2O)4]·H2O, is composed of dinuclear molecules in which the ligand bridges two symmetry-related LiI ions, each coordinated also by two water O atoms, in an O,N,O′-manner. The Li and N atoms occupy special positions on twofold rotation axes, whereas a crystal water molecule is located at the intersection of three twofold rotation axes. The LiI cation shows a distorted trigonal–bipyramidal coordination. Two carboxylate groups remain protonated and form short interligand hydrogen bonds. The molecules are held together by a network of hydrogen bonds in which the coordinating and solvation water molecules act as donors and carboxylate O atoms as acceptors, forming a three-dimensional architecture.

Highlights

The structure of the title compound, [Li2(C8H2N2O8)(H2O)4]H2O, is composed of dinuclear molecules in which the ligand bridges two symmetry-related LiI ions, each coordinated by two water O atoms, in an O,N,O0 -manner
Atoms occupy special positions on twofold rotation axes, whereas a crystal water molecule is located at the intersection of three twofold rotation axes
The molecules are held together by a network of hydrogen bonds in which the coordinating and solvation water molecules act as donors and carboxylate O atoms as acceptors, forming a three-dimensional architecture

Summary

Wojciech Starosta and Janusz Leciejewicz*

R factor = 0.047; wR factor = 0.100; data-to-parameter ratio = 11.8. The structure of the title compound, [Li2(C8H2N2O8)(H2O)4]H2O, is composed of dinuclear molecules in which the ligand bridges two symmetry-related LiI ions, each coordinated by two water O atoms, in an O,N,O0 -manner. The Li and N atoms occupy special positions on twofold rotation axes, whereas a crystal water molecule is located at the intersection of three twofold rotation axes. The LiI cation shows a distorted trigonal–bipyramidal coordination. Two carboxylate groups remain protonated and form short interligand hydrogen bonds. The molecules are held together by a network of hydrogen bonds in which the coordinating and solvation water molecules act as donors and carboxylate O atoms as acceptors, forming a three-dimensional architecture

Related literature

Data collection

Wojciech Starosta and Janusz Leciejewicz

Special details