%0 Journal Article
%T A Chiral Three Dimensional Potassium(I)/Strontium(II)/Chromium(III) Oxalato-Bridged Coordination Polymer: Synthesis, Characterization and Thermal Analysis
%A Justin Nenwa
%A Issoufou Kabor¨¦
%A Yves A. Mbiangu¨¦
%A Patrick L. Djonwouo
%A Peter T. Ndifon
%J Crystal Structure Theory and Applications
%P 67-75
%@ 2169-2505
%D 2014
%I Scientific Research Publishing
%R 10.4236/csta.2014.34008
%X A new compound of general formula {[(H2O)2K(¦Ì-H2O)Sr]@[Cr(C2O4)3]}n (1) has been synthesized in water and characterized by elemental and thermal analyses, EDX, IR and UV-Vis spectroscopies and by single crystal X-ray structure determination. Compound 1 crystallizes in the chiral space group Fdd2 of orthorhombic system with a = 14.110 (4) ?, b = 36.074 (11)?, c =11.034 (3)? and Z = 16. Compound 1 is a coordination polymer in which the three-dimensional lattice framework is realized by the interconnectivity between K+ cations, Sr2+ cations, aqua ligands and [Cr(C2O4)3]3¨C complex anions. The asymmetric unit of 1 consists of one cationic motif formally written
[(H2O)2K(¦Ì-H2O)Sr]3+ and one anionic entity, [Cr(C2O4)3]3¨C. The K+ and Sr2+ ions in the cationic motif are both eight-coordinate while the Cr3+ ions in the anionic complex are six-coordinate in a distorted octahedral geometry. Coulombic interactions between the ionic motifs and the three-dimensional H-bonding involving aqua ligands help to consolidate the bulk structure. Thermogra-vimetric analysis (TGA) shows that compound 1 is stable to heat up to ca. 80¡æ.
%K Tris(Oxalato)Chromate(III) Anion
%K Heterometallic Complex Polymer
%K Chiral Compound
%K Crystal Structure
%K Thermal Stability
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52558