Organic Chemistry 353-Infrared slides BW

Organic Chemistry 353-Infrared slides BW - Interaction with...

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Spectroscopy ± Spectroscopy: the study of the interaction of energy with matter nergy applied to matter can be absorbed emitted cause a ± Energy applied to matter can be absorbed, emitted, cause a chemical change, or be transmitted ± Each molecule will interact with the energy in a characteristic way : Allows us to elucidate structure ± A spectrometer works by measuring the absorption of energy at particular frequencies
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The Electromagnetic Spectrum ± Wavelength and frequency are inversely proportional ( ν = c ) he higher the freq enc the greater the energ of the a e ± The higher the frequency, the greater the energy of the wave ± The shorter the wavelength, the greater the energy of the wave
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Unformatted text preview: Interaction with Molecules Infra-Red Spectroscopy Determine nature of functional groups in a molecule Use wavenumbers 1/ cm-1 (an energy unit) Normal range for organic compounds 600 cm-1 to 4000 cm-1 An infrared spectrometer detects the frequencies absorbed by the sample molecule Light of all the various IR frequencies is transmitted to the molecule and the frequencies absorbed are recorded The spectrum is a plot of frequency on the horizontal axis ersus strength of absorption on the vertical axis versus strength of absorption on the vertical axis Different Types of Vibrations...
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This note was uploaded on 02/02/2011 for the course CHEM 353 taught by Professor Walsh during the Spring '11 term at University of Evansville.

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Organic Chemistry 353-Infrared slides BW - Interaction with...

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