Abstract: Relative rates of hydrogen atom abstraction by photogenerated tert-butoxyl from a variety of cyclic and acyclic ethers, acetals, and orthoformates have been measured at-60'C by an EPR spectroscopic technique. There is a pronounced stereoelectronic effect which produces high rates of abstraction from those CH bonds adjacent to oxygen which have a relatively small dihedral angle (ca. 30') with respect to the ptype orbital (s) on the oxygen ( ...
