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. Author manuscript; available in PMC: 2010 Feb 1.
Published in final edited form as: Curr Opin Chem Biol. 2009 Mar 9;13(1):99–113. doi: 10.1016/j.cbpa.2009.02.011

Scheme 2.

Scheme 2

Zeeman splitting of an S = 1 system with positive zero-field splitting (H||z on left, Hz on right.) The selection rule for C-term MCD intensity requires that the field be perpendicular to the polarization directions of the electronic transition.