Synthesis and Crystal structure of an Iminodiacetatocobalt(Ii) complex with Benzimidazole

Abstract

The title complex, (C₇H₆N₂)₃(C₄H₅NO₄)Co·2H₂O, has been prepared and its crystal structure determined by single-crystal X-ray diffraction methods. The cobalt atom is octahedrally coordinated by three benzimidazole molecules and an iminodiacetate anion. The anion coordinates facially as a tridentate. Extensive intermolecular hydrogen bonding and C−H· · ·π interactions occur in the crystal. Thermal decomposition of the complex has been studied by thermogravimetry and differential scanning calorimetry. The IR spectral assignments were based on the molecular structure.

Keywords:

• Cobalt(II) complex
• Crystal structure
• Iminodiacetate
• Benzimidazole
• Hydrogen bond

Acknowledgements

The project was supported by the Analytical Foundation of Zhejiang University.