Poly(methylene-d2)n
- Monomer Formula: CD2
- Monomer Molecular weight: 16.0389
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Vibrational and/or electronic energy levels
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Takehiko Shimanouchi
Symmetry: D2h Symmetry Number σ = 4
| Sym. | No | Approximate | Selected Freq. | Infrared | Raman | Comments | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Species | type of mode | Value | Rating | Value | Phase | Value | Phase | |||
| ag | 1 | CD2 s-str | 2102 | C | ia | 2102 S | sln. | |||
| ag | 2 | CD2 scis | 1146 | C | ia | 1146 M | sln. | |||
| ag | 3 | CC str | 966 | E | ia | 966 VW | sln. | |||
| au | 4 | CD2 twist | 743 | E | ia | ia | CF | |||
| b1g | 5 | CD2 wag | 1249 | C | ia | 1249 W | sln. | |||
| b1g | 6 | CC str | 820 | E | ia | CF | ||||
| b1u | 7 | CD2 a-str | 2192 | C | 2192 S | sln. | ia | |||
| b1u | 8 | CD2 rock | 526 | C | 528 M | sln. | ia | Doublet due to the crystal field effect | ||
| b1u | 8 | CD2 rock | 526 | C | 522 M | sln. | ia | Doublet due to the crystal field effect | ||
| b2g | 9 | CD2 twist | 916 | C | ia | 916 M | sln. | |||
| b2u | 10 | CD2 s-str | 2088 | C | 2088 S | sln. | ia | |||
| b2u | 11 | CD2 scis | 1090 | C | 1092 S | sln. | ia | Doublet due to the crystal field effect | ||
| b2u | 11 | CD2 scis | 1090 | C | 1087 S | sln. | ia | Doublet due to the crystal field effect | ||
| b3g | 12 | CD2 a-str | 2197 | C | ia | 2197 M | sln. | |||
| b3g | 13 | CD2 rock | 991 | C | ia | 991 M | sln. | |||
| b3u | 14 | CD2 wag | 889 | E | ia | CF | ||||
Source: Shimanouchi, 1972
Notes
| S | Strong |
| M | Medium |
| W | Weak |
| VW | Very weak |
| ia | Inactive |
| CF | Calculated frequency |
| C | 3~6 cm-1 uncertainty |
| E | 15~30 cm-1 uncertainty |
References
Go To: Top, Vibrational and/or electronic energy levels, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Shimanouchi, 1972
Shimanouchi, T.,
Tables of Molecular Vibrational Frequencies Consolidated Volume I, National Bureau of Standards, 1972, 1-160. [all data]
Notes
Go To: Top, Vibrational and/or electronic energy levels, References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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