Structure and Stability Relationship of 1, 1-Dimethyl-2-[β-(α-aroylstyryl)] hydrazine Derivatives

Abstract

Aroylphenylacetylenes (I) reacted with N, N-dimethylhydrazine (II) to give 1, 1-dimethyl-2-[β-(α-aroylstyryl)] hydrazine (III). The structure and configuration of the products are based on chemical and spectroscopic evidence. The protonation constants of these compounds were calculated in 60 wt % dimethylformamide-water media. The effects of substituents on the protonation equilibria are discussed. The log β values were linearly correlated with Hammett substituent constant. The equation of the straight line : log β=(-0.52±0.049)σ+(3.86±0.02).