Carbon dioxide

Molecule

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 $CO_2$

	Atom	Name	Number
	$C$	Carbon	1
	$O$	Oxygen	2

Relations

Molecule symmetry

Dinfh

Case

linear-triatomic

Vibrations number

3

Vibrations

Label	Mode	Bond	Symmetry	Degeneracy	Fundamental frequency	Observed frequency	Harmonic frequency	Activity IR	Activity Raman	Strength	Comments
V1	stretching sym.	$=C=O$	$\Sigma+$	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 asym.	$=C=O$	$\Sigma+$	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 functions and bonds

Chemical bonds

	Bond	Number
	$=C=O$	2