I have skimmed through your posts, and have realized there seems to be a simple component missing to your preperation of p-toluenesulphonic acid, Why are you not using HCL,
Here it is how it should read,.
RC6H5+So3-------H2so4---RC6H4So3H+H
+Procedure:
In a round bottom flask (50ml) fitted with a reflux condensor place pure toluene (13g, 15ml) and conc. sulphuric acid (11g, 6ml).
Boil the mixture gently for 5 minutes with frequent shaking to mix the layers. Cool the mixture in ice water and decant and discard the upper layer (principally toluene); add conc hydrochloric acid (12ml), attach the condensor, heat gently ,just as long as necessary to obtain a clear solution and then cool, as before.
The solid that precipetates is mainly the p-acid but is contaminated with the o-isomer; filter it at the pump and repeat the crystalization to obtain the p-isomer (3-3.2 g) mp.103-105.
If the acid is still slightly deliquesent, repeat the crystallisation to obtain a pure sample, mp 105c.
If This is what you have been doing, forget this post.
Hellman
IQ is the rate of logic, as Wisdom increases logic, fear & compromise decrease to reveal objectivity
