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!