- Type
- absorption
- Assignments summary
- Characteristics summary
| Assignment | Symmetry | Mode | Specie(s) | Molecule/Atom | Bond | Multiplicity | Degeneracy | Contribution | Resonance |
|---|---|---|---|---|---|---|---|---|---|
| ν3 | stretching asym. | 12CH4 | CH4 | ≥ 12C-1H | mode degeneracy | other | |||
| ν3 + nνR | stretching asym. | 12CH4 | CH4 | ≥ 12C-1H | mode degeneracy | other | unknown |
| Peak position (cm-1) |
Center position (cm-1) |
Width (cm-1) |
Shape | Asymmetry factor | Peak intensity (cm-1) |
Peak intensity relative | Peak strength | Integrated intensity (cm-2) |
Integrated intensity relative | Integrated strength | Temperature (K) |
Pressure (bar) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3009 ± 2 | - | - | asymmetric | 5300 ± 200 | 0.6625 | vs | vs | 30.0 |
- Label
- ν3 + nνR
- Category
- fundamental vibration
Evaluation
- Level
- partly assigned
- Evaluation
- uncertain
- Comments
- unresolved rotational structure
- Contribution level
- unknown
- Contribution comments
- blended rotational structure
| # | Multiplicity type | Degeneracy | Other band |
|---|---|---|---|
| 1 | mode degeneracy | other |
- Primary specie
- 12CH4
- Label (type)
- ν3 (stretching asym.) Bond: ≥ 12C-1H
- Label (type)
- nνR (hindered rotation)
Vibration modes
Rotation modes
- Texture
- crystal
- Temperature
- 30.0 ± 1.0 K
- Temperature max
- 38.0 K
Temperature
- Method #1
- spectrum measurement
- Overlap
- slightly blended
- Peak
- 3009 ± 2 cm-1 (peak)
- Evaluation
- validated
- Quality
- B
- Shape
- asymmetric
- Evaluation
- undefined
- Quality
- undefined
- Comments
- possible contributionat of another mode or isotope ~3120cm-1
- Method
- extrapolated
- Absorption coefficient
- 5300 ± 200 cm-1
- Relative intensity
- 0.6625 ± 0.025
- Strength
- very strong (vs)
- Evaluation
- undefined
- Quality
- B
- Comments
- value at 38K (96470 cm-1) extrapolated at 30K using intensity ratio (*0.82) of the first overtone 2ν3
- Method
- extrapolated
- Strength
- very strong (vs)
- Evaluation
- undefined
- Quality
- undefined
- Publications
- SSHADE spectrum