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Organic Chemistry 1


 
 

Spectroscopy of Organic Molecules

  1. Spectroscopy: Interaction of electromagnetic (EM) radiation with matter. Because the response of a compound to EM radiation depends on its structure, spectroscopy can be used to educate the structure of unknown chemical products.

  2. Dual nature of EM radiation: EM radiation behaves both as a particle of light (called a photon) and as a wave moving at the speed of light (c; c = 3 x 108m/s).

  3. Properties of EM particles and waves:

    1. Wavelength (λ): Distance between two peaks or troughs in a light wave.

    2. Frequency (ν): Number of wave cycles that pass a given point per line. Usually measured in Hertz (Hz; 1 Hz = 1 cycle/second).

    3. Energy of a photon: E = hν = hc/λ, where h = Planck’s constant = 6.6 x 10–34 J/sec.