Author Institution: Department of Chemistry, Rice UniversitySome 150 hyperfine transitions belonging to the S08ββ717β and 919ββ100,10β rotational transitions of N14O16O17 have been observed in the microwave region. The new coupling constants which have been determined are the odd-electron expectation values on oxygen. They are β£Ο(0)β£2=0.71Γ1024cmβ3,=β4.71Γ1024cmβ3β and =5.04Γ1024cmβ3. The results of the work are combined with previous work on other isotopic modifications of NO2β to give a LCAO-MO picture of the odd electron orbital. This work was supported by Grant C-071 of The Robert A. Welch Foundation and in part by Grant GP-4166 from the National Science Foundation