Abstract
The rotational spectrum of the weak complex between krypton and phosphorus trifluoride has been observed using a Fourier transform microwave spectrometer with a pulsed supersonic nozzle molecular beam source. The complex is an asymmetric top. The distance r cm between the krypton atom and the center of mass of the PF 3 molecule is 4.0722 Å and the angle between the r cm vector and the C 3 axis of the PF 3 is 68.25°. Based on the centrifugal distortion constant D J and a pseudodiatomic model, the binding energy of the complex is estimated to be 218 cm −1.
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