Molecular Force Field and Centrifugal Distortion Constants of Nitrosyl Fluoride

摘要

The microwave spectrum of nitrosyl fluoride, NOF, has been reinvestigated in the microwave region and extended into the millimeter wave region. Some 80 transitions, consisting of both ``a''hyphen; and ``b''hyphen;type transitions, have been measured and assigned. These data provide the information required for a centrifugal distortion analysis which yields the following groundhyphen;state rotational parameters (megacycles per second):Aequals;95thinsp;189.77,Bequals;11thinsp;844.12,Cequals;10thinsp;508.31,tgr;xxxxequals;minus;0.099630,tgr;zzzzequals;minus;15.586926,tgr;xxzzequals;0.418629,tgr;xzxzequals;minus;0.289581,HJKequals;2.339times;10minus;6andHKJequals;minus;4.946times;10minus;5.Combination of infrared data and microwave data yields the following quadratic potential constants millidynes per angstron,fr1equals;2.09,thinsp;thinsp;fr2equals;15.08,thinsp;thinsp;fagr;sol;d2equals;1.08,thinsp;thinsp;fr1r2equals;1.85,thinsp;thinsp;fr1agr;sol;dequals;0.17.Herefr1andfr2are the Nhyphen;F and Nhyphen;O bond force constants, respectively, andfagr;is the bondhyphen;bending force constant.