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Homework Help: Assigning peaks in a Raman spectrum/ group theory

  1. Feb 3, 2012 #1
    1. The problem statement, all variables and given/known data

    I need help assigning the peaks in a Raman spectrum of acetylene(ethyne).
    The peaks are :
    Wavenumber Contours
    3372 OQS
    1973 OQS
    613 OPRS

    2. The attempt at a solution
    Ethyne has 7 vibrational modes ( with two degenerative modes)
    It has a point group of d infinity h

    I dont see how I calculate the reducibile representitive because its an inifinity group, the order of the group will be infinity for a start.

    All help is greatly appreciated , thanks!
  2. jcsd
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