Carbon hydrogen bending region

It has bean claimed that there is characteristic oxazirane absorption in the infrared at 6. -7.0 p.11 However, since the carbon-hydrogen bending vibration of alkyl groups appears in this same region, this is a... 

Absorptions arising from carbon—hydrogen bending vibrations of alkenes occur in the 600—1000-cm region. With the aid of a spectroscopy handbook, the exact location of these peaks can often be used as evidence for the substitution pattern of the double bond and its configuration. 

The infrared spectra of the product were devoid of spectral features except for a strong carbon-fluorine stretch from 1400 to 1050 cm" which was strongest at 1235 cm and a small carbon-fluorine bending band at 720 cm . The 1235 band had side bands at 1350 cm and 110 cm due to the CF3 stretches. The absences of absorption in the 3000 cm region indicate the absence of hydrogen in the fluorinated product. The yield was 100%. 

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