Synthesis and Crystal Structure of a Magnesium Metal-organic Framework

A magnesium metal organic framework, [NH2(CH3)(2)][N(CH3)(4)][Mg-5(bpdc)(3)(O2CH)(6)]center dot 3H(2)O (1, bpdcH(2) = 4,4'-biphenyldicarboxylic acid), has been solvothermally synthesized and structurally characterized. 1 crystallizes in the trigonal system, space group R-3, with a = 11.3427(3), c = 41.5662(18) angstrom, V = 4631.3(3) angstrom(3), Z = 3 and the final R = 0.0457. Its structure features a pillared-layered three-dimensional network with 8.21 angstrom cavities, in which cationic [NH2(CH3)(2)](+) or [N(CH3)(4)](+) and lattice water molecules are located. Thermal stability of the title compound has also been investigated.