Abstract
The microwave spectra of cyclopropyl carbinol [Formula: see text] and its deuterated (—OD) form were studied in the region of 8 to 35 gHz. Only one of the possible rotational isomers was identified. The measured rotational constants and dipole moments for C3H5CH2OH and C3H5CH2OD are, respectively, A (mHz): 12485.13, 12064.04; B (mHz): 3236.46, 3177.22; C (mHz): 2894.38, 2826.19; κ: −0.928665, −0.924001; μa (D): 1.81, 1.78; μb (D): 0.36, 0.32; μc (D): 0.31, 0.30; μtotal(D): 1.87, 1.84.Rotation is apparently hindered by hydrogen bonding between the hydroxyl hydrogen and the electrons in the strained bonds of the cyclopropyl ring.
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