Bismuth(III) Complexes with Bis(dimethylphenyl) Dithiophosphates: Synthesis, Characterization and Crystal Structure of [{(3,5-CH3)2C6H3O}2PS2]3Bi

Abstract

This work presents four complexes with general formula [{(ArO)₂PS₂}₃Bi] (1–4), where Ar = 2,4-(CH₃)₂C₆H₃, 2,5-(CH₃)₂C₆H₃,3,4-(CH₃)₂C₆H₃ and3,5-(CH₃)₂C₆H₃, respectively. Reaction of [(ArO)₂PS₂Na] with Bi(NO₃)₃·5H₂O in toluene in 3:1 molar stoichiometry afforded the complexes [{(ArO)₂PS₂}₃Bi].These newly synthesized complexes have been characterized by elemental analysis, FT-IR and multinuclear NMR (¹H, ¹³C and ³¹P) NMR. The crystal structure of [{(3,5-CH₃)₂C₆H₃O}₂PS₂]₃Bi (4) has been determined by X-ray crystallography. The compound crystallizes in monoclinic P2₁/c space group and Bi(III) centre is surrounded by six sulfur atoms from three symmetrically chelating bidentate diphenyl dithiophosphate ligands in a distorted octahedron environment. Screening these complexes for their antifungal activity against Pencillium chrysogenum gave positive results.