Molecule
Name
Carbon monoxide
IUPAC name
Carbon monoxide
Secondary names
Carbon oxide, Carbonic oxide, CO
InChI
InChI=1S/CO/c1-2
InChI key
UGFAIRIUMAVXCW-UHFFFAOYSA-N
CAS number
630-08-0
Comments
natural $CO$
Structure and atomic composition
Formula
$CO$
Chemical formula
CO
Structural formula
[C-]#[O+]
Charge
0
Unpaired electrons
0
  Atom Name Number
$C$ Carbon 1
$O$ Oxygen 1
Relations
  • no
Isotope mixture type
terrestrial abundance
Isotopes
  Isotope Mole fraction
$^{12}C^{16}O$ 0.986896
$^{12}C^{17}O$ 0.0003759
$^{12}C^{18}O$ 0.0020281
$^{13}C^{16}O$ 0.010674
$^{13}C^{17}O$ 4.066e-06
$^{13}C^{18}O$ 2.194e-05
Spin type
unique
Spin quantum numbers
0
Molar mass
28.01014082 $g/mol$
State STP
gas
Protic
aprotic
Polarity
nonpolar
Dipole
0.1098 $D$
Molecule symmetry
Cinfv
Case
diatomic
Vibrations number
1
Vibrations
Label Mode Bond Symmetry Degeneracy Fundamental frequency Observed frequency Observed frequency Harmonic frequency Activity IR Activity Raman Strength Comments
V stretching $C^-\equiv O^+$ $\Sigma+$ no 2143.0 2143.2 2169.814 active active vs
Comments
Vibrations of the main isotope: $^{12}C^{16}O$. Data from HITRAN
Publications
Chemical bonds
  Bond Number
$C^-\equiv O^+$ 1