Infrared spectrum of 2-octadecyl-7,7,8,8-tetracyanoquinodimethane

Infrared spectrum of 2-octadecyl-7,7,8,8-tetracyanoquinodimethane was dealt with 2nd-derivative and deconvolution methods. It was first discovered that the band near 2849 cm(-1) assigned to the CH2 Symmetric stretching mode splited into two bands and this splitting might result from the coexistence of two kinds of conformations of CH2 in the hydrocarbon chain.