Crystal structure of 4-(dimethylamino)pyridinium cis-diaquabis(oxalato-κ2O,O')ferrate(III) hemihydrate

Abstract

The FeIII ions in the hybrid title salt, (C7H11N2)[Fe(C2O4)2(H2O)2]·0.5H2O, show a distorted octahedral coordination environment, with four O atoms from two chelating oxalate dianions and two O atoms from two cis aqua ligands. The average Fe -O(oxalate) bond length [2.00 (2) Å] is shorter than the average Fe-O(water) bond length [2.027 (19) Å]. The ionic components are connected via intermolecular N-H···O and O-H···O hydrogen bonds into a three-dimensional network.