Molecule
Name
Carbon dioxide
IUPAC name
Carbon dioxide
Secondary names
Carbonic anhydride, Carbonic acid anhydride, Carbon oxide, CO2
InChI
InChI=1S/CO2/c2-1-3
InChI key
CURLTUGMZLYLDI-UHFFFAOYSA-N
CAS number
124-38-9
Comments
natural $CO_2$
Formula
$CO_2$
Chemical formula
CO2
Structural formula
O=C=O
Charge
0
Unpaired electrons
0
  Atom Name Number
$C$ Carbon 1
$O$ Oxygen 2
Relations
  • no
Isotope mixture type
terrestrial abundance
Spin type
unique
Spin quantum numbers
0
Molar mass
44.00954575 $g/mol$
State STP
gas
Protic
aprotic
Polarity
nonpolar
Dipole
0.0 $D$
Molecule symmetry
Dinfh
Case
linear-triatomic
Vibrations number
3
Vibrations
Label Mode Bond Symmetry Degeneracy Fundamental frequency Observed frequency Observed frequency Harmonic frequency Activity IR Activity Raman Strength Comments
V1 stretching sym. $CO_2$ $\Sigma+$ no 1333.0 1353.6 inactive active ia in Fermi resonance with $2\nu_2$ - Raman: 1285.40 and 1388.15 $cm^{-1}$
V2 bending $CO_2$ $\Pi$ double 667.0 667.38 672.6 active inactive s
V3 stretching antisym. $CO_2$ $\Sigma+$ no 2349.0 2349.16 2396.3 active inactive vs
Comments
Vibrations of the main isotope: $^{12}C^{16}O_2$. Data from NIST Chemistry WebBook and Jobard & Chedin (1975)
Publications
Chemical bonds
  Bond Number
$=C=O$ 2