Figure : The solvent effect on hydrogen abstraction from α-tocopherol is independent of the radical (DPPH (x-axis) or TOH (y-axis)). Each point represents a different solvent. Data from Cl 3 COO• . In these solvents, a mechanistic shift from hydrogen atom abstraction to electron transfer occurs. This electron transfer mechanism may also be accompanied by a solvent-assisted proton loss, known as sequential proton loss electron transfer (SPLET):