Protonated formaldehyde and protonated methanol are candidate interstellar molecules and models for classes of protonatkd oxygen compounds. Ab initio molecular orbital theory has been used to compute rotational constants to guide spectroscopic searches both in the laboratory and in space. The ab tit
A priori predictions of the rotational constants for HC13N, HC15N, and C5O
β Scribed by D.J. Defrees; A.D. McLean
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 426 KB
- Volume
- 158
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Ab initio molecular orbital theory is used to estimate the rotational constant for several carbon-chain molecules that are candidates for discovery in interstellar space. These estimated rotational constants can be used in laboratory or astronomical searches for the molecules. The rotatlonal constant for HCIJN is estimated to be 0.1073 kO.0002 GHz and its dipolc moment 5.4 D. The rotational constant for HClsN is estimated to be 0.0724 GHz,with a somewhat larger uncertainty. The rotational constant ofC@ is estimated to be 1.360 I!I 2% GHz and its dipole moment 4.4. D.
π SIMILAR VOLUMES
The ground-state rotational spectrum of the linear, hydrogen-bonded isotopomer HC'5N...D79Br has been investigated by pulsednozzle Fourier-transform microwave spectroscopy to give the spectroscopic constants &= 1374.4429( 3) MHz, D,= 1.790( ) kHz, x( 79Br) =438.645( 9) MHz and M( 79Br) =2.4( 3) kHz.
## Abstract The relative configuration of 11 1,4βdiazaspiro[4.5]decanes (**1aβ1j** and **1m**), 15 1,4βoxazaspiro[4.5]decanes (**2aβ2o**) and 10 1,4βdioxaspiro[4.5]decanes (**3aβ3n**) substituted at the 2β, 6β, 7β or 8βposition by a methyl group or using the __tert__βbutyl group as a model for the