Synthesis and crystal structure of a tetramer chiral complex {[Cu(C₂₀H₂₆N₄O₂)Cl] Cl·4H₂O}₄

N,N′-bis(L-phenylalanyl)ethane-l,2-diamine was prepared by using L-phenylalanine and ethane-diamine. The synthetic process was improved. The ligand reacted with copper dichloride to form the chiral coordination compound. The single crystal was obtained in methanol solution. It is shown by X-ray structural studies that the crystal belongs to the tetragonal system and the space group is I4. The lattice parameters are as follows: a = 2.5044(4) nm, b = 2.5044(4) nm, c = 0.8707(3) nm, V = 5.461(2) nm³, D_c = 1.365 g/ cm³, Z = 8. In the structure of the complex, the Cu(II) cation is coordinated by two nitrogen atoms, two oxygen atoms and one chlorine atom.