Disulfur monoxide | SSHADE

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Molecule

Name: Disulfur monoxide

Name and identifiers

IUPAC name: Disulfur monoxide
Secondary names: Sulfur suboxide, Sulphur suboxide, Sulfuroxide, Sulphuroxide, S2O
InChI: InChI=1S/OS2/c1-3-2
InChI key: TXKMVPPZCYKFAC-UHFFFAOYSA-N
CAS number: 20901-21-7
Comments: natural $S_2O$

Structure and atomic composition

Formula: $S_2O$
Chemical formula: S2O
Structural formula: S=S=O
Charge: 0
Unpaired electrons: 0

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

Relations

no

Isotopic composition

Isotope mixture type

terrestrial abundance

Isotopes

	Isotope	Mole fraction
	$^{32}S_2^{16}O$	0.90012
	$^{32}S_2^{17}O$	0.00034288
	$^{32}S_2^{18}O$	0.0018497
	$^{32}S^{33}S^{16}O$	0.0071069
	$^{32}S^{34}S^{16}O$	0.740273
	$^{33}S^{32}S^{16}O$	0.0071069
	$^{33}S_2^{16}O$	5.6113e-05
	$^{33}S^{34}S^{16}O$	0.00031798
	$^{34}S^{32}S^{16}O$	0.740273
	$^{34}S^{32}S^{16}O$	1.798e-05
	$^{34}S_2^{16}O$	0.0018019

Nuclear spin isomers

Spin type: unique
Spin quantum numbers: 0

Molar mass: 80.1294 $g/mol$
State STP: gas
Protic: aprotic
Polarity: polar

Fundamental vibration modes

Molecule symmetry

unknown

Case

nonlinear-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	$=S=O$	$A_{}'$	no	1166.0	1166.45			active	active
V2	bending	$S_2O$		no	380.0	380.0			active	active
V3	stretching	$=S=S$		no	679.0	679.1			active	active

Comments

Vibrations of the main isotope:

$^{32}S_2^{16}O$ . Data from NIST Chemistry WebBook

Chemical functions and bonds

Chemical bonds

	Bond	Number
	$=S=O$	1
	$=S=S$	1