Complexes of silanethiolate ligands: Synthesis, structure, properties and application

Salts of Tris(pentafluoroethyl)silylchalcogenolates [Si(C2F5)3E]- with E = S, Se, and Te: Synthesis, Structure, and Reactivity

Unlike silanolates [SiR₃O]^- (R = alkyl, aryl), which have been intensely studied, the heavier derivatives [SiR₃E]^- (E = S, Se, Te) have been much less examined. Among such species, virtually nothing is known about perfluoroalkyl-substituted silylchalcogenolates. In this contribution, a convenient synthesis of tris(pentafluoroethyl)silylchalcogenolate salts [{(Et₂N)₃P═N}₃PN(H)^tBu][Si(C₂F₅)₃E] (E = S, Se, Te; ^tBu = tert-butyl) is presented. All representatives were isolated and fully characterized by multinuclear NMR spectroscopy, IR spectroscopy, mass spectrometry, elemental analysis, and X-ray diffraction studies. Furthermore, first reactivity studies of these novel species toward selected metal halide complexes were performed. In this course, metal complexes [HgPh{SSi(C₂F₅)₃}] (2) and [Au(PPh₃){SSi(C₂F₅)₃}] (3) were isolated and characterized.