A new alkaline earth metal tetrafluoroterephthalate: [Ba(tfBDC)(DMF)(EtOH)]

Abstract

[Ba(C8F4O4)(C3H7NO)(C2H5OH)] or [Ba(tfBDC)(DMF)(EtOH)], where tfBDC2− = tetrafluoroterephthalate, DMF = dimethylformamide, EtOH = ethanol, systematic name poly[(dimethylformamide-1κO)(ethanol-1κO)(μ5-2,3,5,6-tetrafluorobenzenedicarboxylato-1:2κ2O1;1:3κ2O1′;4κO4;5κO4′)barium(II)], has been synthesized by a diffusion controlled synthesis from an EtOH/DMF solution. In the crystal structure two crystallographically independent Ba2+ cations are linked by two crystallographically distinct tfBDC2− anions to form a three-dimensional network structure. The coordination spheres of the first (CN = 8) and second (CN = 8) independent Ba cations are completed by the O atoms of DMF and EtOH molecules, with both EtOH molecules being disordered over two sets of sites (occupancy ratio 0.7:0.3 and 0.6:0.4, respectively).

Keywords

• barium
• coordination polymer
• crystal structure
• tetrafluoroterephthalate