Synthesis and Characterization of O,O'-Bis(α-Naphthyl, β-Naphthyl, and 2, 3, 5-Trimethylphenyl)Dithiophosphate Ligands

Abstract

O,O′-Bis(α-Naphthyl, β-Naphthyl and 2,3,5-trimethylphenyl) dithiophosphate ligands have been isolated as triethylammonium salts, (α-C₁₀H₇O-, β-C₁₀H₇O, and (CH₃)₃C₆H₂O)₂PS₂HNEt₃, by the reaction of α-C₁₀H₇OH, β-C₁₀H₇OH, or (CH₃)₃C₆H₂OH with P₂S₅ in presence of Et₃N, in 4:1:2 molar ratio in chloroform under anhydrous conditions. Acidic form of these ligands, (α-C₁₀H₇O-, β-C₁₀H₇O-, or (CH₃)₃C₆H₂O)₂PS₂H, have been obtained by the direct reaction of α-C₁₀H₇OH, β-C₁₀H₇OH-, or (CH₃)₃C₆H₂OH with P₂S₅ in 4:1 molar ratio in presence of microwaves under solvent-free conditions. Both forms of the ligands have been converted into corresponding sodium salts, (α -C₁₀H₇O-, β-C₁₀H₇O-, or (CH₃)₃C₆H₂O)₂PS₂Na. These compounds have been characterized by elemental analyses (C, H, N, and S) and mass, IR, and NMR (¹H, ¹³C and ³¹P) spectroscopic studies.

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GRAPHICAL ABSTRACT

Keywords:

• α-naphthyl
• β-naphthyl
• 2,3,5-trimethylphenyl
• dithiophosphates
• triethylammonium

Acknowledgments

One of the authors (A. Kumar) is grateful to University Grants Commission, New Delhi, for financial support.