catena-Poly[[aqualithium(I)]-μ-3-carboxy-5,6-dimethylpyrazine-2-carboxylato-κ4 O 2,N 1:O 3,N 4]
نویسندگان
چکیده
The asymmetric unit of the title compound, [Li(C8H6N2O4)(H2O)] n , comprises three Li cations, two of which are located on a twofold rotation axis, two carboxylate anions and three water mol-ecules, of which two are situated on the twofold rotation axis being aqua ligands. Both carboxylate anions are in μ2-bridging mode. All Li ions show a trigonal-bipyramidal coordination mode; the two located in special positions are bridged through N,O-bonding sites generating a polymeric ribbon along the c-axis direction. The Li cation in a general position creates an independent polymeric ribbon through N,O-bonding sites of the two symmetry-related ligands; the trigonal-bipyramidal coordination is completed by an aqua ligand. In both carboxylate anions, a carboxyl-ate and a carb-oxy-lic acid group form an intra-molecular hydrogen bond. The polymeric ribbons running along [001] are inter-connected by hydrogen bonds in which the water mol-ecules act as donors and carboxyl-ate O atoms act as acceptors, giving rise to a three-dimensional architecture.
منابع مشابه
Crystal structure of catena-poly[[[aqualithium(I)]-μ-pyrimidine-2-carboxylato-κ4 N 1,O 2:N 3,O 2′] hemihydrate]
The title compound, {[Li(C5H3N2O2)(H2O)]·0.5H2O} n , comprises four symmetry-independent Li(C5H3N2O2)(H2O) units which form mol-ecular ribbons running along the c-axis direction. Within each ribbon, the ligand mol-ecule, acting in a μ2-mode, bridges two adjacent Li(+) cations using both of its N,O-bonding sites. The coordination environment of each of the four Li(+) cations can be described alt...
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In the title compound, [Ag(2)(C(5)H(2)N(2)O(4))(NH(3))(2)], each of the two Ag(I) atoms is coordinated by two N atoms from an ammonia mol-ecule and a 5-carb-oxy-1H-imidazole-4-carboxyl-ate ligand in an almost linear geometry, and by one carboxyl-ate O atom with a weak inter-action. The Ag atoms are assembled into a linear tetra-mer through Ag⋯Ag inter-actions. Each Ag tetra-mer is linked by fou...
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In the title heterometallic complex, {[Er(C(2)O(4))(H(2)O)(4)][CuBr(C(5)H(3)N(2)O(2))(2)]·4H(2)O}(n), the Er(III) atom is eight-coordin-ated by four O atoms from two centrosymmetric oxalate ligands and four water mol-ecules, displaying a bicapped trigonal-prismatic geometry. The oxalate ligands bridge the Er atoms into a polymeric cationic chain along [110]. The Cu(II) atom is five-coordinated ...
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The crystal structure of the title compound, {[Zn(C(6)H(3)N(2)O(4))(H(2)O)(2)]NO(3)}(n), is built of zigzag cationic chains propagating in [010] with nitrate anions located in the space between the chains. The Zn(II) ion is coordinated by N and O atoms of two symmetry-related ligands in equatorial sites, and by two water O atoms at the axial sites of a distorted octa-hedron. One carboxyl-ate gr...
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