Below is the ) (Table , figure ) which indicates that the carbon 4 and carbon 5 of 3isoxazole carboxylic acid just resemble as ortho and meta substituents respectively to COOH. 1-Me-4/5-X-3-pyrazole carboxylic acids: The rate constants krelative of the solvolysis of 5-X-2-furylmethylcarbinyl p-nitro benzoates and 4-X-2-furylmethylcarbinyl p-nitro benzoates were originally treated with Brown's σ + values . As the σ + values are free from the mesomeric effects, the correlation was good irrespective of the position of the substituent . In the insight of the present work, we have tried the correlation of the rate data of the solvolysis of 5-X-2-furylmethylcarbinyl p-nitro benzoates and 4-X-2-furylmethylcarbinyl p-nitro benzoates separately assuming 5-X substituted derivatives as para-substituents and 4-X substituted derivatives as meta-substituents because it was shown that the 5 and 4 positions of 5-membered heterocycles just correspond to the para and meta positions of benzene ring . Consequently, the rates of solvolysis of 5-X-2-furylmethylcarbinyl p-nitro benzoates correlated well with σpara (figure ) with a correlation coefficient of 0.9862 and the rates of solvolysis of 4-X-2furylmethylcarbinyl p-nitro benzoates correlated well with σmeta (figure ) with a correlation coefficient of 0.9574.