STRUCTURE OF THE DIMERIC COMPLEX OF IRON(III) CHLORIDE WITH PYRIDOXINE

The structure of di-mu-pyridoxinato-bis[aquadichloro-iron(III)], [FeCl 2(mu-C8H10NO3)(H2O)]2, consists of centrosymmetrical dimers in which F e atoms with a slightly distorted octahedral coordination are bridged by the O atoms of two deprotonated 4-hydroxymethyl groups of the chela ting pyridoxinato anions. The other four positions of each Fe coordina tion octahedron are occupied by two Cl atoms, the phenolate O atom of the pyridoxinato ligand and the water molecule. The main interatomic d istances are Fe-O(4-hydroxymethyl) 1.998 (2) and 1.990 (2) angstrom, F e-O(phenolate) 1.949 (2) angstrom, Fe-Cl 2.361 (1) and 2.327 (1) angst rom and Fe-OH2 2.185 (2) angstrom.