Synthesis and spectroscopic characterization of toluene-3,4-dithiolatoarsenic(III)-O,O’-ditolyl/alkylene dithiophosphate compounds: crystal structure of [CH₃C₆H₃S₂As{S₂P(OC₆H₄Me-m)₂}]

Abstract

Toluene-3,4-dithiolate complexes, [CH₃C₆H₃S₂As{S₂P(OR)₂}] and [CH₃C₆H₃S₂AsS₂POGO] (R = o-, m-, p-C₆H₄Me; G = –CH₂C(CH₃)₂CH₂–, –CHCH₃CH₂(CH₃)₂C–), have been synthesized by reaction of toluene-3,4-dithiolatoarsenic(III) chloride [C₆H₃(CH₃)S₂AsCl] with ammonium salts of the corresponding O,O’-ditolyl/alkylene dithiophosphate by refluxing in benzene followed by stirring. These complexes have been characterized by elemental analysis and IR, ¹H, and ³¹P NMR spectroscopy. Single-crystal X-ray diffraction analysis of [CH₃C₆H₃S₂As{S₂P(OC₆H₄Me-m)₂}] revealed distorted trigonal-bipyramidal geometry with an anisobidentate chelating mode of the ditolyl moiety in these complexes.

Graphical Abstract

Keywords:

• Toluene-3,4-dithiolatoarsenic(III) derivatives
• Dithiophosphates
• Crystal structure
• ¹H NMR
• ³¹P NMR

Acknowledgments

We are thankful to SAIF, Panjab University, Panjab and CDRI, Lucknow for the ¹H and ³¹P NMR spectral analyses. We also thank Dr W. Zhang, University of Southampton, Southampton, UK for assisting with the crystallographic data collection.