**ABSTRACT**

Ten 1-(3-chloro-4-nitrophenyl)-2-(substituted benzylidene) hydrazines have been synthesized by FeCl_{3}/Bentonite catalyzed solvent-free condensation of substituted phenyl hydrazine and aldehydes under microwave irradiation. The synthesized hydrazides are characterized by the physical constants, micro analysis and spectroscopic data. The assigned characteristic spectroscopic data of these 1-(3-chloro-4-nitrophenyl)-2-(substituted benzylidene) hydrazines were correlated with Hammett substituent constants, F and R parameters using Hammett equation through single and multi-regression analysis. With the results of statistical analysis results, the quantitative structure activity relationships were studied and finding the effect of substituents on the spectral data.

**References**

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