Full set of Notes with Fill-Ins - San Jose State University

Chem 155 Unit 13 Page 240 of 316Modes of vibration:For example – CO 2 : Linear or Non-linear?# of Modes: 3( ) - ( ) =ν S = 1340 cm -1 ν AS = 2340 cm -1symmetric stretch anti-symmetric stretchδ S = 666 cm -1 δ S = cm -1anti-symmetric stretch, IR activesymmetric stretch, IR inactivebend modes, degenerate, IR activeFor example – H 2 O: Linear or Non-linear?# of Modes: 3( ) - ( ) =ν S (OH) = ν AS (OH) = δ S (OH) =3562 cm -1 3756 cm -1 1596 cm -1Page 240 of 316