Interpretation of IR spectra of the compound having R
= 0.95. Frequency range and probable functional groups of the compound (R
f = 0.946): 2,924.44 and 2,853.33 cm-1, C-H (S) group; 1,745.61 cm-1, C = O (S) stretch; 1,656.87 cm-1, asymmetrical stretch of NO2 compounds (S); 1,461.64 cm-1, scissoring and bending of C-H compounds (V); 1,384.73 cm-1, symmetrical stretches of NO2B Bcompounds (S); 1,044.56 cm-1, C-O stretch (S); 813.83 cm-1, phenyl ring substitution bands (S); 790.17 cm-1, C-H bend (B). V, variable; M, medium; S, strong; Br, broad; W, weak.