Trithioacetophenone.-This compound was used as a source of thioacetophenone. It dissociates to the monomer above its melting point. Trithioacetophenone was prepared by the method described by Baumann and Fromm. 7 The product was readily recrystallized from a mixture of equal volumes of alcohol and acetone, yielding hexagonal bars, mp 121- 122.1'cor. The yield was 21 g., or 37%.