Halogenated Gold(III) Complexes Containing 4-Cyanopyridine: Synthesis, Characterization, and Crystal Structure

Abstract

[Au(CN-py)Cl₃] complex (1) and [Au(CN-py)Br₃] complex (2) (CN-py is 4-cyanopyridine) were prepared from the reaction of 4-cyanopyridine with HAuCl₄.3H₂O and AuBr₃ in acetonitrile, respectively. Both complexes were characterized by IR, UV-Vis, ¹H NMR, and¹³C NMR spectroscopy and their structures were studied by the single-crystal X-ray diffraction method. Intermolecular C-H…Cl hydrogen bonds and Au…Cl contacts in the crystal structure of complex 1 and intermolecular C-H…Br hydrogen bonds and Au…Br and Br…N contacts in complex 2 effectively stabilize these complexes in their crystal structure.

Keywords:

• 4-cyanopyridine
• crystal structure
• gold(III)
• intermolecular interaction

Acknowledgments

The authors are grateful to the Iranian National Science Foundation (Proposal No. 89002417) for financial support.