Abstract: Irradiation of [2.2] paracyclophane in methanol in a quartz vessel with a 200-w medium-pressure lamp produced p-methyl-p'-methoxymethylenebibenzyl (IV), p- ethylbibenzyl (V), p, p'-dimethylbibenzyl (VI), p-methyl-p'-p-hydroxyethylbibenzyl (VII), and ...