THE ROTATIONAL g FACTOR OF DIATOMIC MOLECULES IN STATE 'Z+ OR O+ J. F. OGILVIE Centre for Experimental and Constructive Mathematics, Simon Fraser Universih, Burnab!; BC V5A IS6 Canada J. ODDERSHEDE Department of Chemistry, Odense Universih: DK-5230 Odense M, Denmark STEPHAN P. A. SAUER Chemist? Laboratory IV Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen 0, Denmark CONTENTS I. Introduction A. Description of Phenomena B. Chronicle of Origins of Rotational g Factor C. Definition of Magnetic Quantities I. Magnetizability 2. Rotational g Factor 3. 4. D. Relation of Rotational g Factor to an Effective Hamiltonian Relation Between Rotational g Factor and Electric Dipolar Moment Relation Between Rotational g Factor and Electric Quadrupolar Moment 11. Experimental Methods A. Molecular Beams B. Microwave Spectrometry With Zeeman Effect C. Magnetic Resonance in the Far Infrared Region ~~ ~ Advances in Chemical Phyics, Volume 11 1. Edited by I. Prigogine and Stuart A. Rice. ISBN 0-471-34990-9. 2000 John Wiley & Sons. Inc. 475