15min:

RICHARD J. LAVRICH, CHARLES R. TOROK AND MICHAEL J. TUBERGEN, Department of Chemistry, Kent State University, Kent, OH 44242.

Microwave spectra have been measured for the most abundant isotopic species of two van der Waals complexes of 3-hydroxytetrahydrofuran: 3-hydroxytetrahydrofuran-H₂O and 3-hydroxytetrahydrofuran-Ar. For the H₂O complex the fitted rotational constants suggest that the water molecule forms a double hydrogen bond with the furan by donating a hydrogen bond to the ring oxygen and accepting a hydrogen bond from the hydroxyl group. Preliminary Stark effect experiments have been performed, yielding µ_a~=~1.2 (3), µ_b~=~1.82 (1), and µ_c~=~0.7 (4) D. The rotational constants of the argon complex are fit best by a model that has the Ar atom situated on the same side of the ring as the hydroxyl group.