Microwave and Infrared Measurements on HCN and DCN: Observations on <i>l</i>-Type Resonance Doublets

Abstract

Microwave measurements have been made on the direct doublet splittings (ΔJ=0 transitions) of the 0110, 0220, 0310, and 0330 levels of DCN and the 0110 and 0220 levels of HCN. The sensitivity of the Δ and φ level splittings to certain vibrational and rotational constants enables us to obtain new values for those constants. New infrared measurements are given for ν1, 3ν21, 4ν20—ν21, and 4ν22—ν21 of HCN.