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 CH2Br2 (dibromomethane)

using model chemistry: HSEh1PBE/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HSEh1PBE/6-311+G(3df,2p)
 hartrees
Energy at 0K-5186.875399
Energy at 298.15K 
HF Energy-5186.875399
Nuclear repulsion energy352.426541
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 HSEh1PBE/6-311+G(3df,2p)
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 3142 3142 0.81 88.55 0.05 0.09
2 A1 1436 1436 0.14 10.18 0.51 0.68
3 A1 597 597 3.29 17.18 0.06 0.11
4 A1 173 173 0.08 3.48 0.35 0.52
5 A2 1123 1123 0.00 0.98 0.75 0.86
6 B1 3229 3229 3.33 43.73 0.75 0.86
7 B1 820 820 3.98 0.32 0.75 0.86
8 B2 1219 1219 57.19 0.18 0.75 0.86
9 B2 666 666 94.77 4.12 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6202.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6202.1 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 HSEh1PBE/6-311+G(3df,2p)
ABC
0.89173 0.04088 0.03939

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-311+G(3df,2p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.927
H2 -0.898 0.000 1.532
H3 0.898 0.000 1.532
Br4 0.000 1.613 -0.123
Br5 0.000 -1.613 -0.123

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08261.08261.92491.9249
H21.08261.79552.47952.4795
H31.08261.79552.47952.4795
Br41.92492.47952.47953.2263
Br51.92492.47952.47953.2263

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.046 H2 C1 Br4 107.753
H2 C1 Br5 107.753 H3 C1 Br4 107.753
H3 C1 Br5 107.753 Br4 C1 Br5 113.868
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.311      
2 H 0.189      
3 H 0.189      
4 Br -0.033      
5 Br -0.033      


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 1.481 1.481
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.260 0.000 0.000
y 0.000 -44.683 0.000
z 0.000 0.000 -40.820
Traceless
 xyz
x -0.508 0.000 0.000
y 0.000 -2.643 0.000
z 0.000 0.000 3.151
Polar
3z2-r26.302
x2-y21.423
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.688 0.000 0.000
y 0.000 11.166 0.000
z 0.000 0.000 7.310


<r2> (average value of r2) Å2
<r2> 221.490
(<r2>)1/2 14.883