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Millimeter-wave spectrum of DCCCHO in the ground vibrational state
Authors:Michio Takami
Institution:Microwave Physics Laboratory, The Institute of Physical and Chemical Research, Wako, Saitama 351, Japan
Abstract:About 140 a- and b-type millimeter-wave transitions of propynal-d1, DCCCHO, were measured in the ground vibrational state. The accurate rotational and centrifugal distortion constants were determined from the observed frequencies including the previous microwave measurements. Seven microwave transitions observed by infrared-microwave double resonance were also included in the analysis. The determined constants are A = 66778.016(12), B = 4463.8489(7), C = 4177.7950(7), ΔJ = 0.0015919(5), ΔJK = −0.139214(13), ΔK = 9.4328(18), δJ = 0.0002885(4), δK = 0.03069(4), HJK = −0.817(13) × 10−6, HKJ = −9.62(4) × 10−6, HK = 0.00255(8), hJ = 0.0047(3) × 10−6, in MHz.
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