in many pool stores you can get a gallon of 50% benzyl dialkyl (c16) methyl ammonium chloride which is useful for ptc. if you heat a quaternary ammonium salt with sodium hydroxide you get a tertiary amine and an alcohol. if you add 3% h2o2 to a tertiary amine for 24 hours and heat the oxo compound formed you get a secondary amine and an aldehyde. is there any way to determine which substituants are most likely to be split off during these processes?