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Z. Naturforsch. 2012, 67b, 452 – 458
doi:10.5560/ZNB.2012-0064
Synthesis, Crystallographic and Spectral Characterization of a Cadmium Chloride Complex Containing a Novel Imidazo[1,5-a]Pyridine Derivative
Mohammad Hakimi1, Zahra Mardani1, Keyvan Moeini1, Fabian Mohr2, Esther Schuh2, and Hooshang Vahedi1
1 Chemistry Department, Payame Noor University, 19395-4697 Tehran, I. R. Iran
2 Fachbereich C – Anorganische Chemie, Bergische Universität Wuppertal, 42119 Wuppertal, Germany
Reprint requests to Mohammad Hakimi. Fax: +98 511 8683001. E-mail: mohakimi@yahoo.com
Received March 2, 2012 / published online May 31, 2012
The reaction between 2-(2-amino-ethylamino)ethanol and pyridine-2-carbaldehyde in a 1:3 molar ratio gave 3-(pyridin-2-yl)-1-(pyridin-2-ylmethyl)imidazo[1,5-a]pyridine (PPIP) which was characterized by elemental analysis and spectroscopic methods. The study of CSD-deposited structures revealed that PPIP is a new derivative of imidazo[1,5-a]pyridine. The cadmium chloride complex of this ligand [Cd(PPIP)Cl2][Cd(PPIP)Cl2]′·3H2O (1) was prepared and identified by elemental analysis, FT-IR, Raman and 1H NMR spectroscopy, and single-crystal X-ray diffraction. In the crystal structure of 1, there are two cadmium complexes with slightly different coordination bond lengths and angles. Also water molecules are incorporated in the crystal network. The geometry around the cadmium atom which is coordinated by two pyridine and one imine nitrogen atoms and two chloride ions is distorted square pyramidal. All bond lengths compare well with CSD averages of similar structures. The hydrogen bonds including O–H···Cl and O–H···O present in the crystal structure of 1 are also comparable to those in analogs.
Key words: Imidazo-[1,5-a] pyridine Derivative, Cadmium Complex, Synthesis, X-Ray Crystal Structure
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