In the EPR part of the book 'Physical methods in Inorganic Chemistry' by S. Drago i found that relative magnitudes of crystal field and spin-orbit coupling affect the g values. I understand that the chemical environment of a metal complex partly removes the orbital degeneracy, but i don't find the way to imagine a sustaining effect which implies that if an electron has an orbital angular momentum this is manteined by coupling to the spin angular momentum. I have read that consequently a net orbital magnetic moment results, giving a g value different from the free electron. I also can't imagine how when the crystal field increases the LS coupling is broken down completely.
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