| Abstract: A alkaline earth metal-organic complex, namely, Sr(BuTA)0.5(H2O)2(1) (H4BuTA=1,2,3,4-Butanetetra-carboxylic acid), was obtained in water system by hydrothermal method based on flexible multi-carboxylate ligand. The title complex was characterized by elemental analysis and X-ray crystallography. The result of structural analysis shows that the complex 1 crystallizes in monoclinic, space group P21/c with a=0.870 03(5) nm, b=0.793 03(5) nm, c=1.268 07(5) nm, β=127.689(3)°, V=0.692 36(7) nm3, Z=4, Dc=2.290 g·cm-3, F(000)=468, μ=7.768 cm-1, the final R=0.015 8, wR=0.037 7. In complex 1, the coordination environment of Sr(Ⅱ) is eight-coordinated with square antiprismatic geometry. The metal ions and ligands link each other to form a 3D framework of (46)2(412.612.84) topology, in which the BuTA2- anions act as rare 8-connected topological blocks. The thermal stability of complex 1 was also investigated. CCDC: 825571. |
