Rearrangement of X to form a-(2,4,6-trimethylbenzyl)-2,4,6trimethylbenzyldimethylamine (XI). This rearrangement was carried out with 24.7 g. (0.0715 mole) of bis(2,4,6-trimethylbenzyl)-dimethylammonium chloride (X) and 0.2 mole of sodium amide in 300 ml. of liquid ammonia essentially as described for the rearrangement of I. The reaction period was 6 hr. The ether insoluble salts were triturated with 100 ml. of water acidified with hydrochloric acid. Removed from this mixture by filtration was 9.2 g. (37% recovery) of quaternary salt X, m.p. 196-197°, mixed m.p. 200-201°. The neutral fraction was not steam distilled. After evaporation of the ether the solid residue was recrystallized from methanol yielding 0.05 g. (0.5%) of crudel, 2-dimesitylethane, m.p. 100-105°. Two more recrystallizations from methanol raised the melting point to 112-114°, mixed m.p. 114-115°, lit.,20 m.p. 117-118°. The mother liquor from the first recrystallization of the dimesitylethane was treated with 2,4-dinitrophenylhydrazine solution and a yield of 0.05 g. (0.2%) of 2,4,6-trimethylbenzaldehyde-2,4-dinitrophenylbydrazone was precipitated, which after one recrystallization from ethanol melted at 246-248°, mixed m.p. 249-250°, lit.,24 m.p. 250-251°.From the amine fraction was obtained 12.90 g. (58%) of crude amine, which after one recrystallization from methanol yielded 11.1 g. (50%) of pure a-(2,4,6-trimethylbenzyl)-2,4,-6-trimethylbenzyldimcthylamine (XI), m.p. 100.5-101°.