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topic 4442

p-toluensulfonic acid



I'm currently writing my final project and I can't find the Pka value for p-toluensulfonic acid.

can anybody help.


Caroline A [last name deleted for privacy by Editor]
Technical university of Denmark - Denmark


Para-toluenesulfonic acid is too strong an acid to have its pKa determined directly in an aqueous solution. Jerry March in "Advanced Organic Chemistry" (4th edition, p. 250) gives a general value of -(minus!) 6.5 for aromatic sulfonic acids, ArSO3H. His reference for that is Cerfontain & al., Tetrahedron Letters 1975, p. 3639. I hope this helps.

Emanuel I. Cooper
IBM Research - Yorktown Heights, New York


Thank you very much it helps a lot.

Caroline A
- Denmark


Environmental Organic Chemistry by Schwarzenbach et al. page list a pKa for p=Toluenesulfonic acid of .70 at 25C.

I hope this helps.

- Tucson, Arizona

September 26, 2008

I am writing my MSC final project I need to Know PKa value of Camphor- solfonic acid please help me

Thanks a lot

Hakimeh Amiry
project - Tabriz, Iran

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