Infrared Spectrum and Molecular Constants of CD4
| Autor: | Alvin H. Nielsen, Hoyt M. Kaylor |
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| Rok vydání: | 1955 |
| Předmět: | |
| Zdroj: | The Journal of Chemical Physics. 23:2139-2152 |
| ISSN: | 1089-7690 0021-9606 |
| Popis: | The infrared spectrum of CD4 has been examined from 900 cm—1 to 8500 cm—1. A total of twenty‐eight bands were observed, including four originally measured by Nielsen and Nielsen under somewhat lower resolving power. Twenty‐three bands were attributed to CD4, two to CD3H, two to CH4, and one was unassigned. With the aid of the band centers of the corresponding fundamentals in CH4, the following vibrational constants of CD4 were obtained: the normal frequencies ω1=2143.2, ω2=1109.4, ω3=2336.8, ω4 1026.8 cm−1; the harmonic potential energy constants k1=2.093×105, k2=2.841×105, k3=8.463×105, k4=2.790×105, k5=1.329×105 dynes/cm. From the rotational analysis of nine bands, the B values of the upper states for these modes of vibration were found as well as the following rotational constants: the vibration‐rotation interaction constants α1=—0.017, α2=—0.015, α3=0.014, α4=0.017 cm—1; B0=2.591 cm—1; Be=2.614 cm—1; Ie=10.70×10—40 g‐cm2; rC—D=1.095×10—8 cm; rD—D=1.788×10—8 cm; and the moduli of the internal angul... |
| Databáze: | OpenAIRE |
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