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

Abstract

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].

Poly[μ2-aqua-μ2-(pyrazine-2-carboxylato)-lithium]

“…For the crystal structure of an Li I complex with a 3-aminopyrazine-2-carboxylate ligand, see: Starosta & Leciejewicz, (2010) and for the crystal structure of an Li I complex with a 5-methylpyrazine-2-carboxylate ligand, see: Starosta & Leciejewicz, (2011a). The structures of complexes with pyridazine-3-carboxylate and pyridazine-4-carboxylate ligands were reported by Starosta & Leciejewicz, (2011b,c).…”

“…Symmetry code: (i) Àx þ 1 2 ; y; z þ 1 2 . (Starosta & Leciejewicz, 2010) while the structure of a complex with 5-methylpyrazine-2-carboxylato ligand is composed of molecular columns (Starosta & Leciejewicz, 2011a). Molecular layers were reported in the structure of a complex with pyrimidine-2-carboxylato and nitrato ligands (Starosta & Leciejewicz, 2011d) and in the structure of a complex with pyridazine-4-carboxylato ligand (Starosta & Leciejewicz, 2011c).…”