EPR-SPECTRA OF TRIS(TRIMETHYLSILYL)METHYL(HYDROXY)SILYL RADICALS, (ME(3)SI)(3)CSI(R)OH-CENTER-DOT, AND OF TRIS(TRIMETHYLSILYL)METHYLSILANONE RADICAL-ANIONS, (ME(3)SI)(3)CSI(R)=O-CENTER-DOT- (R=H, ME, ET, BN, PH, F)

The EPR spectra are reported of the tris(trimethylsilyl)methylsilyl ra dicals (Me(3)Si)(3)CSiH(n-1)R(3-n) (R = H, Et or F, n = 1, 2 or 3) whi ch were prepared by abstraction of hydrogen atoms from the correspondi ng tris(trimethylsilyl)methylsilanes, (Me(3)Si)(3)CSiH(n)R(3-n) by pho tolytically generated tert-butoxyl radicals in tert-butyl alcohol-di-t ert-butyl peroxide as solvent. Similar reactions with the silanols (Me (3)Si)(3)CSiH(R)OH (R = H, Me, Et, Bu, Ph, F) under neutral conditions gave the spectra of the corresponding hydroxysilyl radicals (Me(3)Si) (3)CSi(R)OH., and, in the presence of potassium tert-butoxide, gave th e spectra of the silanone radical anions (Me(3)Si)(3)CSi(R)=O-.-.