Abstract

The rotational spectra of two conformations of 3-chloro-propanol were observed for the four possible Cl(35) Cl(37) and H D isotopic species. For both conformations the oxygen atom is gauche with respect to the C 2C 3 bond and the hydroxyl hydrogen is trans with respect to the C 2C 1 bond. In one conformation ( T) the chlorine is trans with respect to C 1C 2 and it is gauche in the other form ( G). The ground state of the G form is about 0.7 kcal/mole more stable than that of the T form. A discussion is given about the failure to observe the H bond species. The most likely reason is the too close approach of Cl and O in this hypothetical configuration. The quadrupole coupling constants were obtained for the G form. The rotational spectra of five excited states of the T form and of one excited state of the G species were measured. Partial r 0 and r s structures are given.

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