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

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 I was determined by single-crystal X-ray diffraction. Crystal data for the complex 1: space group C2/c, with a = 18.967(2)A, b = 14.526(2)angstrom, c = 15.3927(18)angstrom, alpha=90.00 degrees, beta= 95.885(3)degrees, gamma=90.00 degrees, Z=8, V= 4218.5(9) angstrom(3), Dc= 1.494 mg.m(-3), mu= 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+ via coordinate 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.