Molecule
- Name
- Ethylene
- IUPAC name
- Ethylene
- Secondary names
- Ethene, Acetene, C2H4
- InChI
- InChI=1S/C2H4/c1-2/h1-2H2
- InChI key
- VGGSQFUCUMXWEO-UHFFFAOYSA-N
- CAS number
- 74-85-1
- Comments
- natural $C_2H_4$
- Formula
- $C_2H_4$
- Chemical formula
- C2H4
- Structural formula
- [CH2]=[CH2]
- Charge
- 0
- Unpaired electrons
- 0
- Relations
-
- no
- Isotope mixture type
- terrestrial abundance
- Spin type
- equilibrated
- Spin quantum numbers
- 0, 1, 2
- Molar mass
- 28.0532 $g/mol$
- State STP
- gas
- Protic
- aprotic
- Polarity
- nonpolar
- Dipole
- 0.0 $D$
- Molecule symmetry
- D2h
- Case
- nonlinear-polyatomic
- Vibrations number
- 12
- Vibrations
-
Label Mode Bond Symmetry Degeneracy Fundamental frequency Observed frequency Observed frequency Harmonic frequency Activity IR Activity Raman Strength Comments V1 stretching sym. $>C<H_2$ $A$ no 3026.0 inactive active ia Raman: 3026.4 $cm^{-1}$ V2 stretching $>C=C<$ $A$ no 1623.0 inactive active ia Fermi resonance with $2\nu_10$ - Raman: 1622.6 $cm^{-1}$ V3 bending sym. in-p (scissoring) $>C<H_2$ $A$ no 1342.0 inactive active ia Raman: 1342.2 $cm^{-1}$ V4 bending asym. out-p (twisting) $>C<H_2$ $A$ no 1023.0 inactive inactive ia Frequency estimated from $\nu_4+\nu_6$ V5 stretching asym. $>C<H_2$ $B_{1}$ no 3103.0 inactive active ia Raman: 3102.5 $cm^{-1}$ V6 bending asym. in-p (rocking) $>C<H_2$ $B_{1}$ no 1236.0 inactive active ia Raman: 1236 $cm^{-1}$ V7 bending sym. out-p (wagging) $>C<H_2$ $B_{1}$ no 949.0 949.3 active inactive m V8 bending sym. out-p (wagging) $>C<H_2$ $B_{2}$ no 943.0 inactive active ia Raman: 943 $cm^{-1}$ V9 stretching asym. $>C<H_2$ $B_{2}$ no 3106.0 3105.5 active inactive s V10 bending asym. in-p (rocking) $>C<H_2$ $B_{2}$ no 826.0 826.0 active inactive w V11 stretching sym. $>C<H_2$ $B_{3}$ no 2989.0 2988.66 active inactive s V12 bending sym. in-p (scissoring) $>C<H_2$ $B_{3}$ no 1444.0 1443.5 active inactive s - Comments
- Vibrations of the main isotope: $^{12}C_2H_4$. Data from NIST Chemistry WebBook
- Publications