Millimeter Wave Spectrum, Molecular Structure, and Dipole Moment of Hydrogen Selenide

Abstract
Several rotational transitions of various Se isotopic species of H2Se and D2Se have been measured in the shorter millimeter wave region. These yield the value of 1.460±0.013 A for the bond length and 91.0°±0.6° for the bond angle. From Stark effect measurements on two of the transitions the value 0.24±0.02 Debye is obtained for the molecular dipole moment.