Synthesis and structural characterization of silver(I) complexes with moon-shaped benzo[1,2-b;4,3-b′]dithiophene phosphine derivative ligands

New silver complexes of general formula [Ag(O3SCF3)(PPh2{bzt})n] (n = 1–3, bzt = benzo[1,2-b;4,3-b′]dithiophene) have been synthesized and characterized. Spectroscopic studies shown neutral ligand fluxionallity, typical of silver(I) complexes. The solid state structure of the complexes was determined by X-ray crystallographic studies, showing a decrease in structure complexity with increasing number of neutral ligands in silver coordination sphere: [Ag(O3SCF3)(PPh2{bzt})] is a dimer with two bridging triflate anions, further linked into polymeric bidimensional chains along bc plane, through Ag⋯Ph close contacts; Ag(O3SCF3)(PPh2{bzt})2] is also a dimmer with two bridging triflate anions, displaying an interesting packing feature, with zig-zag alignment of bzt groups along direction b; [Ag(O3SCF3)(PPh2{bzt})3] is a monomer.

Graphical abstractNew silver complexes of general formula [Ag(O3SCF3)(PPh2{bzt})n] (n = 1–3, bzt = benzo[1,2-b;4,3-b′]dithiophene) have been synthesized and characterized. Spectroscopic studies revealed neutral ligand fluxionallity. X-ray crystallographic studies showed a decrease in structure complexity with increasing number of neutral ligands. A very unusual Ag⋯C short contact was found for compound [Ag(O3SCF3)(PPh2{bzt})].Figure optionsDownload full-size imageDownload as PowerPoint slide