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The pure rotational spectrum of diazomethane, H2CNN, in the millimeter wave region

1983; Elsevier BV; Volume: 97; Issue: 1 Linguagem: Inglês

10.1016/0022-2852(83)90342-9

1096-083X

Eckhard Schäfer, Manfred Winnewisser,

Advanced Chemical Physics Studies

The rotational spectrum of diazomethane, H2CNN, was investigated in the frequency range 100 to 400 GHz. Due to the C2v symmetry of the molecule, which is planar, only a-type dipole transitions were observed. The measurements were analyzed using Watson's S-reduced Hamiltonian. A detailed centrifugal distortion analysis yielded the following rotational and quartic centrifugal distortion constants: A = 272 979.1(8.1) MHz, B = 11 305.42697(45) MHz, C = 10 845.22028(47) MHz, DJ = 4.14620(74) kHz, DJK = 396.817(92) kHz, DK = 22.0 MHz (fixed), d1 = −192.55(42) kHz, d2 = −57.27(39) Hz. Some sextic and higher-order distortion constants were determined and are discussed.