Radio frequency transitions within six different rotational levels of oxygen difluoride have been observed in the presence of external electric fields. These data were analyzed in terms of the dipole moment, polarizability anisotropies, spin rotation, and spinndash;spin interactions: mgr;=0.308thinsp;18(3) D, agr;aaminus;agr;bb=1.389(8) Aring;3,agr;aaminus;agr;cc=1.883(10) Aring;3,Maa=59.60(7) kHz,Mbb=25.05(11) kHz,Mcc=51.39(8) kHz, and lang;1/R3rang;=0.0941(5) Aring;minus;3.
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