Abstract

CHDF₂ gas was synethesized in several steps in high isotopic purity. All nine fundamentals were observed in the infrared spectrum, and the region from 920 to 1200 cm⁻¹ was scanned at 0.005-cm⁻¹ resolution. This region contains four fundamentals with strong Coriolis coupling about several molecular axes: the four band origins are found within a range of 160 cm⁻¹. Two other fundamentals near 1360 cm⁻¹ have origins closer than 10 cm⁻¹. Molecular constants from the rotational analysis are reported and are compared to predictions from the force fields deduced by other workers. A listing of some coincidences with CO₂ laser lines is also presented; the isotopomers CH₂F₂ and CD₂F₂ both show numerous far-IR laser lines when suitably pumped with CO₂ lasers.

© 1986 Optical Society of America