Sulfur dioxide

Molecule

IUPAC name: Sulfur dioxide
Secondary names: Sulfurous anhydride, Sulfurous oxide, Sulfur oxide, Sulphur dioxide, Sulfurous acid anhydride, SO2
InChI: InChI=1S/O2S/c1-3-2
InChI key: RAHZWNYVWXNFOC-UHFFFAOYSA-N
CAS number: 7446-09-5
Comments: natural $SO_2$

	Atom	Name	Number
	$S$	Sulfur	1
	$O$	Oxygen	2

Relations

Isotope mixture type

terrestrial abundance

Isotopes

Molecule symmetry

C2v

Case

nonlinear-triatomic

Vibrations number

3

Vibrations

Label	Mode	Bond	Symmetry	Degeneracy	Fundamental frequency	Observed frequency	Activity IR	Activity Raman	Strength	Comments
V1	stretching sym.	$SO_2$	$A_{1}$	no	1151.0	1151.4	active	active	s	Raman: 1150.5 $cm^{-1}$ (s)
V2	bending	$SO_2$	$A_{1}$	no	518.0	517.7	active	active	s	Raman: 524.5 $cm^{-1}$ (liq, w)
V3	stretching asym.	$SO_2$	$B_{1}$	no	1362.0	1361.8	active	active	s	Raman: 1336 $cm^{-1}$ (liq, w)

Comments

Vibrations of the main isotope:

^{32} S^{16} O_{2}

$^{32}S^{16}O_2$ . Data from NIST Chemistry WebBook

Publications

Chemical bonds

	Bond	Number
	$=S=O$	2