Spectroscopic Study of benzene molecular


The mid Infrared, Near infrared, visible, and Ultra-violet spectra of Benzenemolecule have been studied. Since Benzene molecule belongs to D6h point group,with very high symmetry elements, therefore it may be expected for its externalvibrations to be either infrared or Raman active only. The mid infrared spectrum ofthe molecule shows only the active infrared fundamental and combination bands.However no overtone bands have been detected within this region because of itssymmetry. The ultra -violet region shows cut off starting at (350 nm) due tod d* and π π* electronic transitions. However no absorption has beenobserved within visible region (400-800)nm, which is confirmed since pure benzeneliquid has no color.