A radical change: Cyclic alkyl(amino) carbenes formed zwitterionic adducts with SiCl₄, which were further converted into carbon-centered stable radicals by changing the donor-acceptor C→Si coordinate bond into a CSi covalent bond through a KC₈ reduction. As the carbon radical site was directly bonded to a SiCl₃ unit, a radical center that is right next to an acceptor has been generated.