Structural studies and conductivity of [Fe(O 3 C 4)(COO)]·H 2 O based H 4 btec (H 4 btec = 1,2,4,5-benzenetetracarboxylic acid)

Abstract

A\rnew metal-organic hybrid compound [Fe(O3C4)(COO)]·H2O\rI has been hydrothermally synthesized and characterized by single-crystal X-ray\rdiffraction. Rust crystals crystallize in the monoclinic system, space group I2/a, a = 6.9651(2) A, b = 8.12630(10) A, c =\r19.4245(2) A, β = 92.6600(10)°; V = 1098.25(4) A3; Z = 2 and Dx =3.63g/cm3.\rThe refinement converged into R =\r0.042; Rw = 0.058. The\rstructure, determined by single crystal X-ray diffraction, consists of a\rnetwork of FeO6 centers, octahedral coordinated by btec (btec = 1,2,4,5-benzenetetracarboxylic\racid) anions giving rise to a\rtwo-dimensional sheet structure. In the compound I, [Fe(O3C4)(COO)]·H2O,\rthe FeO6 group bridged by the 1,2,4,5-benzenetetracarboxyl anion\rexist in a unit cell, with each anion lying about an inversion centre. One of the FeO2 adistance [1.965(2)] significantly corresponds to the\rshortest distance as the other and the distances found in the axial direction\rof compound I.