Molecule
- Name
- Methane
- IUPAC name
- Methane
- Secondary names
- Methyl hydride, CH4
- InChI
- InChI=1S/CH4/h1H4
- InChI key
- VNWKTOKETHGBQD-UHFFFAOYSA-N
- CAS number
- 74-82-8
- Comments
- natural $CH_4$
- Formula
- $CH_4$
- Chemical formula
- CH4
- Structural formula
- [CH4]
- Charge
- 0
- Unpaired electrons
- 0
- Relations
-
- no
- Spin type
- equilibrated
- Spin quantum numbers
- 0, 1, 2
- Molar mass
- 16.04249891 $g/mol$
- State STP
- gas
- Protic
- aprotic
- Polarity
- nonpolar
- Dipole
- 0.0 $D$
- Molecule symmetry
- Td
- Case
- spherical-top
- Vibrations number
- 4
- Vibrations
-
Label Mode Bond Symmetry Degeneracy Fundamental frequency Observed frequency Observed frequency Harmonic frequency Activity IR Activity Raman Strength Comments V1 stretching sym. $CH_4$ $A_{1}$ no 2917.0 3025.5 inactive active ia Raman: 2917.0 $cm^{-1}$ (gas) V2 deformation $CH_4$ $E$ double 1534.0 1533.0 1582.7 inactive active m inactif, but Coriolis interaction with V4 - Raman: 2917.0 $cm^{-1}$ (gas) V3 stretching $CH_4$ $F_{2}$ triple 3018.9 3156.8 active active vs Raman: 3019.5 $cm^{-1}$ (gas) V4 deformation $CH_4$ $F_{2}$ triple 1306.2 1367.4 active inactive vs - Comments
- Vibrations of the main isotope: $^{12}CH_4$. Harmonic frequencies from Gray and Robiette (1979) - Data from NIST Chemistry WebBook
- Publications