Infrared Energy Modes IR energy absorption corresponds to specific modes, corresponding to combinations of atomic movements, such as bending and stretching of bonds between groups of atoms called"normal modes Energy is characteristic of the atoms in the group and their bonding Corresponds to vibrations and rotations Symmetric Antisymmetric In-plane Out-of-plane stretching Thomson· BrookInfrared Energy Modes • IR energy absorption corresponds to specific modes, corresponding to combinations of atomic movements, such as bending and stretching of bonds between groups of atoms called “normal modes” • Energy is characteristic of the atoms in the group and their bonding • Corresponds to vibrations and rotations