@红外拉曼光谱 098元6 50 CH3(CH2)6CH CH 000 (C-H bending CH2 CH (C-H bending CH 10F(C-H stretching)-(C-H stretching) 40003600320028002400200018001600140012001000800650 Wavenumber(cm-1) FIGURE 13. 5 The IR spectrum of octane( Notice that, in IR spectra, the peaks are usually measured in transmittance. Thus, the peak at 2900 cm" has 10%o transmittance( that is, an absorbance, A, of 0.90)