Vibrational Modes lovalent bonds can vibrate in several modes, including Streching, rocking and scissoring The most useful bands in an infrared spectrum corresponde to Shetching frequencies and those with be the one's H H H H H 4 0 0 0 Symmetic stretching Antisymmetric stretching Bending(sussuring) Stretching Vibrations Symmetric Asymmetric Bending Vibrations Near Near Far Near In-plane In-plane rocking sussoring Out-of- - plane out of plane wagging twisting.
AN IR SPECTRUM IN ABSORPTION MODE The IR spectrum is basically a plot of transmitted (or absorbed) frequencies v/s intensity of the transmis. (or absorption). Frequencies appear in the x-axis in un of inverse centimeter (wave numbers), and intensities plotted on the y-axis in percentage. Absorption 100/ 0% ~3600 (un') frequency in wave no. (un-1) fig- Spectrum in absorption mode AN IR SPECTRUM IN TRANMISSION MODE Transmission 1001. 0% ~ 3600 cm-1 frequency in wave no (cm-1) The graph above shows a Spectrum in transmission mode The is the most commonly used representation and the one