QUESTÃO 130 QUÍMICA | ENEM PPL ( 2 APLICAÇÃO )

QUESTION 130 CHEMISTRY | ENEM PPL (2 APPLICATION) LINK: https://drive.google.com/open?id=1um3... (Enem PPL 2018) Infrared radiation interacts with the oscillation of the electric field generated by the vibrational movement of atoms in a chemical bond. The stronger the bonds and the lighter the atoms involved, the greater the energy and, therefore, the higher the frequency of the infrared radiation associated with the vibration of the chemical bond. The structure of the molecule 2-amino-6-cyanopyridine is shown. The chemical bond of this molecule, involving atoms other than hydrogen, which absorbs infrared radiation most frequently, is: