Clicking on the different bands of the pentane spectrum activates the corresponding vibrational mode in the molecular model.
CH tension : 3000 cm −1 -2800 cm -1
CH bending: CH 2 bending (scissors) at 1465 cm -1 , which overlaps with asymmetric methyl bending at 1450 cm -1 . Symmetrical bending of methyls at 1375 cm −1 .