Abstract
Abstract The azomethine proton chemical shift of thirteen para-substituted neutral Schiff bases, XC 6 H 4 CHNC 6 H 4 Y, has been determined in DMSO. Excellent correlation of the chemical shifts of azomethine group with Hammet σ p constants was obtained for substituents in the benzaldehyde moiety. The lack of correlation for substituents in the aniline ring was attributed to the non-planar structure of the benzalaniline derivatives.
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