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

Abstract

[Ba(C 8 F 4 O 4 )(C 3 H 7 NO)(C 2 H 5 OH)] or [Ba(tfBDC)(DMF)(EtOH)], where tfBDC 2− = tetrafluoroterephthalate, DMF = dimethylformamide, EtOH = ethanol, systematic name poly[(dimethylformamide-1κ O )(ethanol-1κ O )(μ 5 -2,3,5,6-tetrafluorobenzenedicarboxylato-1:2κ 2 O 1 ;1:3κ 2 O 1′ ;4κ O 4 ;5κ O 4′ )barium(II)], has been synthesized by a diffusion controlled synthesis from an EtOH/DMF solution. In the crystal structure two crystallographically independent Ba 2+ cations are linked by two crystallographically distinct tfBDC 2− 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).