Synthesis and Crystal Structure of the Complex of (R,R)-N,N’-bis(salicylal)-1,2-Cyclohexanediamine with Fe3+

Abstract

The complex 1 (FeC20H24N3O7) was synthesized from (R, R)-N,N-bis (salicylal )1,2-cyclohexanediamine (H2L) and Fe (NO3)3. The complex 1 has been characterized by the elemental analysis and IR spectra. The crystal structure of the complex 1 was determined by single-crystal X-ray diffraction. Crystal data for the complex 1: space group C2/c , with a = 18.967(2)Å, b = 14.526(2)Å, c = 15.3927(18)Å, α=90.00º, β= 95.885(3) º, γ=90.00º, Z=8, V= 4218.5(9) Å3, Dc= 1.494 mg.m-3, µ= 0.763mm-1, F(000)= 1976. The results of crystal structure determination show that there exists rich H-bond. The complex 1 is composed of one [Fe (L2-) (H2O)2]+cation and one nitrate anion. The L2-and two H2O molecular are attached to the Fe3+viacoordinate bond. The nitrate anion is attached to the cation through hydrogen bond with H (3A) and H (4B) atom. The Fe (III) atom is six-coordinated by linking to one quarter-dentate chelating ligand (L2-) and two mono-dentate chelating H2O ligands.