A series of eleven substituted dipyrido[3,2-a; 2′,3′-c]phenazine derivatives have been synthesized and examined their purities by literature method. The infrared and 13C NMR spectral data of prepared phenazines were correlated with Hammett substituent constants, F and R parameters using single and multi-regression analysis. From the results of statistical analysis, the effect of substituents on the infrared frequencies (ν, cm-1) and 13C nmr chemical shifts(δ, ppm) has been studied.
International Letters of Chemistry, Physics and Astronomy (Volume 48)
G. Thirunarayanan et al., "Effect of Substituents on Phenazine Derivatives by Spectral Studies", International Letters of Chemistry, Physics and Astronomy, Vol. 48, pp. 114-122, 2015