The first vertical ionization energies of dialkylethers are lowered up to 3 eV (!) by beta-trimethylsilyl substituents and, therefore, further confirm the powerful electron donor effect of -CH3-n[Si(CH3)3]n and -Si[Si(CH3)3]3 groups. The gas-phase photoelectron spectra are assigned based on geometry-optimized MNDO calculations and the substituent effects are discussed in terms of conformationally dependent hyperconjugative second order perturbations.
The first vertical ionization energies of dialkylethers are lowered up to 3 eV (!) by beta-trimethylsilyl substituents and, therefore, further confirm the powerful electron donor effect of -CH3-n[Si(CH3)3]n and -Si[Si(CH3)3]3 groups. The gas-phase photoelectron spectra are assigned based on geometry-optimized MNDO calculations and the substituent effects are discussed in terms of conformationally dependent hyperconjugative second order perturbations.
OLAH, G. A.;DOGGWEILER, H.;FELBERG, J. D.;FROHLICH, S., J. ORG. CHEM., 1985, 50, N 24, 4847-4851
作者:OLAH, G. A.、DOGGWEILER, H.、FELBERG, J. D.、FROHLICH, S.