Research Article: Poly[di-μ2-aqua-μ2-(5-methyl­pyrazine-2-carboxyl­ato)-(5-methyl­pyrazine-2-carboxyl­ato)-μ3-nitrato-trilithium]

Date Published: July 01, 2011

Publisher: International Union of Crystallography

Author(s): Wojciech Starosta, Janusz Leciejewicz.


The asymmetric unit of the title compound, [Li3(C6H5N2O2)2(NO3)(H2O)2]n contains three LiI ions, two ligand anions, two water mol­ecules and a nitrate anion. Related by a centre of inversion, they form a centrosymmetric mol­ecular cluster in which one of the LiI ions shows trigonal–bipyramidal and the other two distorted tetra­hedral coordination. LiI ions are bridged by water O atoms and carboxyl­ate O atoms donated by one of the ligands. The clusters, bridged by two nitrato O atoms, form mol­ecular columns along [010], which are held together by O—H⋯O and O—H⋯N hydrogen bonds and π–π inter­actions [centroid–centroid distances = 3.694 (1) and 3.796 (1) Å].

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For the structure of a lithium complex with 3-amino­pyrazine-2-carboxyl­ate and aqua ligands, see: Starosta & Leciejewicz (2010 ▶). The structures of two complexes with pyridazine carboxyl­ate ligands have been also determined, see: Starosta & Leciejewicz (2011a ▶,b ▶). For the structure of a LiI complex with pyrimidine carboxyl­ate and nitrate ligands, see: Starosta & Leciejewicz (2011c ▶).




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