The Syntheses and Characterization of New Dithiophosphonates derived from Novel 2,4-Bis(methoxytolyl)-1,3-dithia-2,4-diphosphetane 2,4- disulfides and Their Ni(II) Complexes

Abstract

Two novel perthiophosphonic acid anhydrides, 2,4-bis(Rx,y)-1,3-dithia-2,4-diphosphetane 2,4-disulfide [(Rx,y‐P(S)S)2; Rx=3-methoxytolyl (SAV-B1) and Ry=2-methoxytolyl (SAV-B2)] weresynthesized. From the reaction of SAV-B1 and SAV-B2 with alcohols, four new dithiophosphonic acids[HS2P(Rx,y)(ORn)] (Rn; R1=ethyl R2=2-propyl) were prepared. These acids were converted tocorresponding ammonium salts, [NH4][S2P(Rx,y)(ORn)]. The ammonium salts were further reacted withNiCl2.6H2O to prepare four new dithiophosphonato nickel(II) complexes, [Ni(S2P(Rx,y)(ORn))2]. Theligands and complexes were characterized by elemental analyses, IR, ESI-MS, 1D 1H, 13C, 31P NMR and 2DHSQC techniques. Complementary structural information was provided by the HSQC spectrum of the[NH4][S2P(Rx,y)(OR2)]. The structure of the perthiophosphonic acid anhydrides was deduced from thestructures of dithiophosphonates thereof.