Z. Naturforsch. 2013,
68b, 1327 – 1332
doi:10.5560/ZNB.2013-3193
Synthesis and Characterization of a Zinc(II) Complex of Bispicen
Beatriz S.
Parajón-Costa1,
Gustavo A.
Echeverría2,
Oscar E.
Piro2, and
Enrique J.
Baran1
1 Facultad de Ciencias Exactas, Centro de Química Inorgánica (CEQUINOR/CONICET – CCT-La Plata, UNLP), Universidad Nacional de La Plata, C. Correo 962, 1900 La Plata, Argentina
2 Facultad de Ciencias Exactas, Departamento de Física and Instituto IFLP (CONICET – CCT-La Plata), Universidad Nacional de La Plata, 1900 La Plata, Argentina
Received August 2, 2013 / published online November 22, 2013
The synthesis of a Zn(II) complex of bispicen, the tetradentate ligand N,N′-bis(2-pyridylmethyl)-ethylenediamine, of composition [Zn(bispicen)Cl(H2O)]2[ZnCl4] is reported. Its crystal and molecular structure was determined by single-crystal X-ray diffraction methods. It crystallizes in the monoclinic space group C2/c with Z = 4 molecules per unit cell. The Zn(II) cation in the [Zn(bispicen)Cl(H2O)]+ complex is in a distorted octahedral environment, coordinated to a neutral bispicen molecule acting as a tetradentate ligand through its two amine nitrogen atoms, at cis positions, and its two pyridyl N atoms, at trans positions. The six-fold coordination is completed by a chloride ion and a water
molecule. The tetrahedral [ZnCl4]2− counter-ion lies on a crystallographic twofold axis. The complex was further characterized by FTIR spectroscopy, and its vibrational behavior compared with that of the dihydrated tetrahydrochloride of free bispicen.
Key words: Zn(II)-bispicen Complex, Crystal Structure, FTIR Spectra