Microwave Spectrum of Propylene Imine

Abstract
The microwave spectrum of propylene imine has been investigated in the range 9–40 GHz. The rotational constants associated with two species of molecules were found to be 16 893.00, 6533.71, and 5761.26 MHz for the trans isomer and 16 665.66, 6558.64, and 5812.36 MHz for what is probably the cis isomer. The dipole‐moment components for the trans isomer were found to be μa = 0.21±0.06, μb = 0.81±0.03, and μc = 1.36±0.02 D, and for the other species of molecule, μa = 1.28±0.01, μb = 0.95±0.08, and μc = 0.78±0.08 D.
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