-8, R* CH,-2-1210%) 13 (4%) fil61%)(0.03 mmol) in 6 mL of benzene was sealed in an ampule and degassed by a freezepumpthaw method (four cycles). The ampule was dipped in an oil bath controlled at 80" C for 2 h. The mixture was directly analyzed with GCMS on a 20% SE-30 on 60-80 mesh chromosorb W 3 mm id X 2 m column at an oven temperature of 70-230" C. The GC spectrum revealed that two major peaks were obtained. The two peaks ...