return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH2Br (bromomethyl radical)

using model chemistry: PBEPBEultrafine/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes C2V 2A1

Conformer 1 (CS)

Jump to S1C2
Vibrational Frequencies calculated at PBEPBEultrafine/aug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at PBEPBEultrafine/aug-cc-pVTZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/aug-cc-pVTZ
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at PBEPBEultrafine/aug-cc-pVTZ
 hartrees
Energy at 0K-2613.016053
Energy at 298.15K 
HF Energy-2613.016053
Nuclear repulsion energy80.609162
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at PBEPBEultrafine/aug-cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3105 3071 3.67 132.15 0.08 0.14
2 A1 1332 1317 13.82 1.11 0.40 0.57
3 A1 700 692 14.50 11.96 0.09 0.17
4 B1 178 176 64.84 1.54 0.75 0.86
5 B2 3256 3219 0.83 57.55 0.75 0.86
6 B2 899 889 1.04 0.79 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4735.0 cm-1
Scaled (by 0.9888) Zero Point Vibrational Energy (zpe) 4682.0 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at PBEPBEultrafine/aug-cc-pVTZ
ABC
9.07116 0.37777 0.36267

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/aug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.486
Br2 0.000 0.000 0.368
H3 0.000 0.960 -1.989
H4 0.000 -0.960 -1.989

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.85451.08401.0840
Br21.85452.54562.5456
H31.08402.54561.9204
H41.08402.54561.9204

picture of bromomethyl radical state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 117.655 Br2 C1 H4 117.655
H3 C1 H4 124.690
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.788      
2 Br 0.193      
3 H 0.297      
4 H 0.297      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.839 0.839
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.621 0.000 0.000
y 0.000 -24.567 0.000
z 0.000 0.000 -22.362
Traceless
 xyz
x -3.156 0.000 0.000
y 0.000 -0.076 0.000
z 0.000 0.000 3.232
Polar
3z2-r26.464
x2-y2-2.054
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.663 0.000 0.000
y 0.000 4.801 0.000
z 0.000 0.000 7.141


<r2> (average value of r2) Å2
<r2> 43.071
(<r2>)1/2 6.563