Synthesis, IR and NMR spectral correlations in some symmetrical diimines

Abstract

A series of diimines have been synthesized by coupling of diamine with substituted benzaldehydes. The purities of these diimines were checked by their analytical and spectroscopic data. The spectral frequencies νCN (cm^-1), NMR chemical shifts (δ, ppm) of C-H and C=N of these diimines have been correlated with Hammett substituent constants, F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effect of substituents on the above spectral data has been studied.

KEY WORDS: Diimines, IR and NMR spectra, Spectral correlation, Hammett sigma constants

Bull. Chem. Soc. Ethiop. 2014, 28(1), 73-79.

DOI: http://dx.doi.org/10.4314/bcse.v28i1.9