In scheme 3, structure A is the depiction of the benzene derivative with substituents at ortho, meta and para positions to FG. would be para. Therefore, the substituent constants in pyrazolium moiety given in table 1 are justified. The substituent constant of 3,5-dimethyl is taken as -0.17 because the Taft * value of 3-methyl group would be zero which is ortho to N + (2) position and that of 5-methyl group is -0.17 which is considered as para substituent via the carbons 3 and 4. One can argue that the 5-methyl group is to be considered as meta to nitrogen at position 2 via nitrogen at position 1. This may not be possible because the reaction site that is the deprotonation site of nitrogen at position 3 is not in conjugation with carbon at position 5. They are separated by two single bonds which may act as insulators for any effect to be transmitted shown by 5-methyl group on the deprotonation from the nitrogen at position 3. Therefore the 5-methyl group is considered as para to the deprotonation site via the carbons 3 and 4 since they are in conjugation with two  bonds which in turn can transmit substituent effect. Deviation of 4-Cl from the correlation is not explainable at present. The Hammett plot for deprotonation equilibrium of indazolium cation is shown as in figure . The structure of indazolium cation is shown as in scheme 5. The same trend is expected with the half-wave potentials of pyrazoles and indazoles because the pKaH+ and the half-wave potentials are related to each other by the eqn. E½ (mV, vs SCE) = -m•pKa + constant . The plots are as shown in figure and. The factor 2.48 is the mean value of the Hammett reaction constants ρB for base-catalyzed hydrolysis (BAc2 mechanism: bimolecular, base catalyzed, acyl oxygen fission) of meta and para substituted ethyl and methyl benzoates in different solvents and at different temperatures.