PHOTOLYSIS OF DIALKOXY DISULFIDES - A CONVENIENT SOURCE OF ALKOXY RADICALS FOR ADDITION TO THE SPHERE OF FULLERENE C-60

Photolysis of dialkoxy disulfides ROSSOR (R = Me, Et, i-Pr, t-Bu, i-Pr CH2, t-BuCH(2)) yields the radicals RO(.), ROS(.), and ROS(.)=O that w ere identified on the basis of product analysis and spin trapping tech niques. It has been shown that only the alkoxy radicals RO(.), produce d from ROSSOR, add to the sphere of fullerene C-60 in steady state con ditions to yield the RO-C-60(.) adducts which can be detected by ESR s pectroscopy. The different trend of the hydrogen splitting constants i n the RO-C-60(.) with respect to the corresponding RS-C-60(.) adducts previously reported has been interpreted as a consequence of the diffe rent C-O and C-S bond lengths.