Under C4v symmetry, which irreducible representations, if any, correspond to an IR active vibration and which ones correspond to a Raman active vibration? And which ones correspond to an IR active vibration under D2h symmetry?

Under C4v symmetry, which irreducible representations, if any, correspond to an IR active vibration and which ones correspond to a Raman active vibration? And which ones correspond to an IR active vibration under D2h symmetry?

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

ChapterL3: Carbon (13c) Nmr Spectroscopy

Section: Chapter Questions

Problem 1E

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Under C_4v symmetry, which irreducible representations, if any, correspond to an IR active vibration and which ones correspond to a Raman active vibration?

And which ones correspond to an IR active vibration under D_2hsymmetry?

Expert Solution

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For a molecule to be vibrational active, check the irreducible representations corresponding to x, y and z. For a molecule to be Raman active, check the irreducible representations corresponding to quadratic functions.

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