Synthesis and Characterization of Some Monomeric and Dimeric Silver(I)-Phosphine Complexes With N-Donor Bridging Ligands

Abstract

The monomeric complexes [Ag(PPh₃)₂]X (X = ClO₄ ⁻ or NO₃) was synthesized by a metathesis reaction of [Ag₂(PPh₃)₄(μ-SO₄)] with BaX₂ (where X = ClO₄ ⁻ or NO₃ ⁻) in ethanol. The reactivity of [Ag(PPh₃)₂]X (where X = ClO₄ ⁻ or NO₃ ⁻) with some potential N-donor bridging ligands viz. 4,4′ bipyridine and pyrazine yielded dimeric complexes of the type [Ag₂(PPh₃)₄(μ-L-L)]X₂ (where L-L = 4,4′-bipyridine or pyrazine, and X = ClO₄ ⁻ or NO₃ ⁻). All these complexes were characterized by infrared spectroscopy, conductivity measurements, cyclic voltammetry, ¹H NMR, and electronic spectroscopy.

Keywords:

• dimeric
• monomeric
• pyrazine
• silver(I)
• triphenylphosphine
• 4,4′-bipyridine

Acknowledgments

Acknowledgement is made to the UGC, NERO, Guwahatii, for their financial assistance under MRP scheme. Thanks are also due to the Department of Chemistry, NEHU, Shillong, for their support. The authors are grateful to the Head, Department of Chemistry, St. Edmund's College, Shillong, for his help and support.