Crystal Structure Theory and Applications, 2014, 3, 67-75 Published Online December 2014 in SciRes. http://www.scirp.org/journal/csta http://dx.doi.org/10.4236/csta.2014.34008 How to cite this paper: Nenwa, J., Kaboré, I., Mbiangué, Y.A., Djonwouo, P.L. and Ndifon, P.T. (2014) A Chiral Three Dimen- sional Potassium(I)/Strontium(II)/Chromium(III) Oxalato-Bridged Coordination Polymer: Synthesis, Characterization and Ther- mal Analysis. Crystal Structure Theory and Applications, 3, 67-75. http://dx.doi.org/10.4236/csta.2014.34008 A Chiral Three Dimensional Potassium(I)/Strontium(II)/Chromium(III) Oxalato-Bridged Coordination Polymer: Synthesis, Characterization and Thermal Analysis Justin Nenwa 1* , Issoufou Kaboré 1 , Yves A. Mbiangué 2 , Patrick L. Djonwouo 1 , Peter T. Ndifon 1 1 Department of Inorganic Chemistry, University of Yaounde 1, Yaounde, Cameroon 2 Chemistry Department, Higher Teachers’ Training College, University of Maroua, Maroua, Cameroon Email: * jnenwa@yahoo.fr Received 11 october 2014; revised 8 november 2014; accepted 26 november 2014 Copyright © 2014 by authors and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). http://creativecommons.org/licenses/by/4.0/ Abstract A new compound of general formula {[(H 2 O) 2 K(µ-H 2 O)Sr]@[Cr(C 2 O 4 ) 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) Å, b = 36.074 (11) Å, c =11.034 (3) Å and Z = 16. Compound 1 is a coordination polymer in which the three-dimensional lattice framework is realized by the interconnectivity between K + cations, Sr 2+ cations, aqua ligands and [Cr(C 2 O 4 ) 3 ] 3− complex anions. The asymmetric unit of 1 consists of one cationic motif formally written [(H 2 O) 2 K(µ-H 2 O)Sr] 3+ and one anionic entity, [Cr(C 2 O 4 ) 3 ] 3− . The K + and Sr 2+ ions in the cationic mo- tif are both eight-coordinate while the Cr 3+ ions in the anionic complex are six-coordinate in a dis- torted octahedral geometry. Coulombic interactions between the ionic motifs and the three-di- mensional 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˚C. Keywords Tris(Oxalato)Chromate(III) Anion, Heterometallic Complex Polymer, Chiral Compound, Crystal * Corresponding author.