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Infrared spectra of molecules and materials of astrophysical interest (Document No: 19790007707)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Durig, J. R. |
| Copyright Year | 1978 |
| Description | The Raman spectra of gaseous, liquid and solid, and infrared spectra of gaseous and solid isopropylamine-d sub 0 and -d sub 2 was investigated between 4000 and 50 cm superscript -1. Differences between the spectrum of the solid phase and that of the fluid phases were interpreted in terms of an equilibrium between low energy s-trans and high energy gauche conformers, and a complete vibrational assignment was proposed for the s-trans conformer. The far infrared spectra of the gaseous compounds contained bands due to the asymmetric amino and coupled methyl torsions; the assignment of these bands was aided by observation of a number of two quantum transitions for each vibrational mode. The asymmetric potential functions were calculated, which resulted in values for the enthalpy differences between conformers in the gaseous phase of 446 and 523 callmole for the sub 0 -d and -d sub 2 compounds, respectively. The methyl torsional potential function of isopropylamine-d sub 0 was calculated which led to a value for the barrier height to internal rotation of the methyl rotors of 4.23 + or - 0.06 kcal/mole. Values for the ideal gas thermodynamic functions were calculated over a range of temperatures. |
| File Size | 1883854 |
| Page Count | 52 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19790007707 |
| Archival Resource Key | ark:/13960/t4zh1f92h |
| Language | English |
| Publisher Date | 1978-11-01 |
| Access Restriction | Open |
| Subject Keyword | Lunar And Planetary Exploration Hydrazines Astrophysics Molecular Spectra Jupiter Atmosphere Hydrocarbons Infrared Spectra Vibrational Spectra Isopropyl Compounds Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
