Fingerprint of Molecule Whole-molecule vibrations and bending vibrations are also quantitized. No two molecules will give exactly the same IR spectrum (except enantiomers) Simple stretching:1600-3500 cm-1. Complex vibrations:600-1400 cm-1, called the“fingerprint region.” 二> Chapter 12 10Chapter 12 10 Fingerprint of Molecule • Whole-molecule vibrations and bending vibrations are also quantitized. • No two molecules will give exactly the same IR spectrum (except enantiomers). • Simple stretching: 1600-3500 cm-1 . • Complex vibrations: 600-1400 cm-1 , called the “fingerprint region.” =>