FROM the results obtained by Holleman, 1 Hückel 2 has calculated the relative action constants and the differences between the energies of activation for the nitration of certain benzene derivatives ...

Benzenesulfonic acid is the simplest aromatic sulfonic acid. It is highly water-soluble and a strong acid with a pK a of –2.8. It has been known since at least the 1880s; its synthesis, which goes ...