EPR spectra of tris(trimethylsilyl)methyl(hydroxy)silyl radicals, (Me3Si)3CSi(R)OH˙, and of tris(trimethylsilyl)methylsilanone radical anions, (Me3Si)3CSi(R)O˙–(R = H, Me, Et, Bu, Ph, F)

Abstract

The EPR spectra are reported of the tris(trimethylsilyl)methylsilyl radicals (Me₃Si)₃CSiH_{n– 1}R_{3 –n}(R = H, Et or F, n= 1, 2 or 3) which were prepared by abstraction of hydrogen atoms from the corresponding tris(trimethylsilyl)methylsilanes, (Me₃Si)₃CSiH_nR_{3 –n} by photolytically generated tert-butoxyl radicals in tert-butyl alcohol–di-tert-butyl peroxide as solvent. Similar reactions with the silanols (Me₃Si)₃CSiH(R)OH (R = H, Me, Et, Bu, Ph, F) under neutral conditions gave the spectra of the corresponding hydroxysilyl radicals (Me₃Si)₃CSi(R)OH˙, and, in the presence of potassium tert-butoxide, gave the spectra of the silanone radical anions (Me₃Si)₃CSi(R)O˙^–.