The infrared spectra of trifluoroamine oxide and its 15N analogue have been measured from 4000 to 260 cm−1. Fundamental frequency assignments (based upon C3v symmetry) made from the 14N spectrum are: v1(a1) = 1689, v2(a1)= 740, v3 (a1) = 528, v4(e) = 880, and v6(e) = 398 cm−1. Normal coordinate calculations support the assignment of the remaining fundamental v5(e) to a band system appearing as a shoulder, about 558 cm−1, on the intense v3(a1) fundamental.

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