Double degenerate, Physics

Illustrated below are 5 of  the normal modes of ethylene (HCCH). At its equilibrium geometry this molecule has no dipole moment, but for some of the normal modes the distortion during the vibration  induced a dipole. Explain which  of the  normal
modes are IR active and Describe why modes 4 and 5 are every double degenerate.  

Posted Date: 3/19/2013 3:13:33 AM | Location : United States







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