CH3CN\mathrm{CH}_{3} \mathrm{CN}CH3CN
CH3COCl\mathrm{CH}_{3} \mathrm{COCl}CH3COCl
CH3CH2Cl\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Cl}CH3CH2Cl
CH3Cl\mathrm{CH}_{3} \mathrm{Cl}CH3Cl