return to home page

II.A.1. (XV.A.)

Listing of experimental data for CHBr (bromomethylene)

InChI=1S/CHBr/c1-2/h1H [CH]Br
State Conformation
1A' CS
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency (cm-1) Frequency Reference Intensity (km mol-1) Int. unc. Intensity Reference Comment
1 A' 2902 webbook       CH str
2 A' 1118 webbook       bend
3 A' 676 webbook       CBr str

vibrational zero-point energy: 2348.1 cm-1
Calculated vibrational frequencies for CHBr (bromomethylene).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment

Calculated rotational constants for CHBr (bromomethylene).

Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6

Geometric Data
picture of bromomethylene

Point Group Cs

Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees
Description Value unc. Connectivity Reference Comment
Atom 1 Atom 2 Atom 3 Atom 4

Atom x (Å) y (Å) z (Å)

Atom - Atom Distances bond lengths
Distances in Å

Calculated geometries for CHBr (bromomethylene).

Bond descriptions
Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
H-C 1
C-Br 1

Atom 1 Atom 2
C1 Br2
C1 H3

Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A'
2005 3 webbook 3A"

Electron Affinity (eV)
Electron Affinity unc. reference
1.454 0.005 webbook

Dipole, Quadrupole and Polarizability
Electric dipole moment dipole
Calculated electric dipole moments for CHBr (bromomethylene).
Electric quadrupole moment quadrupole
Calculated electric quadrupole moments for CHBr (bromomethylene).

By selecting the following links, you may be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to
squib reference DOI
webbook NIST Chemistry Webbook (  

Got a better number? Please email us at