title: catena-Poly[[(aqualithium)-μ-3-carboxypyrazine-2-carboxylato-κO,N:O,N] monohydrate].
abstract: The polymeric structure of the title compound {[Li(C(6)H(3)N(2)O(4))(H(2)O)]·H(2)O}(n), contains two symmetry-independent Li(I) complex units, both having distorted trigonal-bipyramidal coordination environments. The Li(I) ions are bridged by both the N and O atoms of the ligands, generating two symmetry-independent polymeric chains propagating along the b-axis direction. In both ligands, the second carboxyl-ato O atom remains protonated, serving as a donor in a short intra-molecular O-H⋯O hydrogen bond. The coordination of each Li(I) ion is completed by a water O atom. The ribbons are held together by a network of O-H⋯O hydrogen bonds in which the coordinated and uncoordinated water mol-ecules are donors and the carboxyl-ato O atoms act as acceptors.
authors.affiliation: Institute of Nuclear Chemistry and Technology, ul.Dorodna 16, 03-195 Warszawa,  Poland.
authors.forename: Wojciech
authors.initials: W
authors.lastname: Starosta
authors.forename: Janusz
authors.initials: J
authors.lastname: Leciejewicz
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2010 Dec 08;67(Pt 1):m50-1
references.pmid: 21522570
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2009 Nov 28;65(Pt 12):m1704-5
references.pmid: 21578706
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2008 Feb 20;64(Pt 3):m491-2
references.pmid: 21201874
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2010 Nov 13;66(Pt 12):m1561-2
references.pmid: 21589251