I have the vibrational frequencies of ibuprofen(IBF) using DFT methods which performed using gaussian 03 program.I want to assign these frequencies with the suitable vibration motion seen at gauss view.my proplem, in some frequencies there are many vibration motion in different moieties of IBF molecules and i want know which motions is corresponding to these frequency. Also I need some tutorial in vibrational assignments and i want some books to explain me the forms of vibration motions of groups such as (Methylene, Methyl, Carboxyl, Nitro,......)
can anyone help me in this proplem?
I don't well understand the question: Gaussview is already showing you which vibration corresponds to which frequency.
What else do you want to know?
As for a tutorial on vibrations, an introduction can be found in most introductury textbooks on Physical Chemistry.
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