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

Yin Zhi Jiang; Lian Zhu Tian; Yang Zou; Lian Qun Zhang

doi:10.4028/www.scientific.net/AMR.441.382

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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 (L^2-) (H₂O)₂] ⁺cation and one nitrate anion. The L^2- 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 (L^2-) and two mono-dentate chelating H₂O ligands.