“…The pentane extract was evaporated in vacuum to give 0.43 g (82%) yellow solid of 1-mesityl-3,4,5-triphenyl-1,2-diphosphole (4). 1 H NMR (CDCl 3 , d, ppm, J, Hz): 2.23 (s, 3H, Me), 2.36 (s, 6H, Me), 6.83 (d, 3 J HH = 3.4 Hz, 2H, Ph), 6.93-6.97 (m, 3H, Ph), 7.01 (d, 3 J HH = 5.2 Hz, 5H, Ph), 7.08-7.12 (m, 3H, Ph), 7.14-7.19 (m, 4H, Ph). 31 P{ 1 H} NMR (CDCl 3 , d, ppm, J, Hz): 194.2 (d, 1 J PP = 432.5 Hz), 52.2 (d, 1 J PP = 432.5 Hz).…”