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: wB97X-D/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at wB97X-D/Def2TZVPP
 hartrees
Energy at 0K-5187.739029
Energy at 298.15K 
HF Energy-5187.739029
Nuclear repulsion energy352.339996
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 wB97X-D/Def2TZVPP
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 3152 3011 1.54 94.08 0.05 0.10
2 A1 1451 1386 0.02 11.61 0.62 0.77
3 A1 603 576 3.83 14.65 0.09 0.16
4 A1 175 167 0.10 3.85 0.41 0.59
5 A2 1135 1084 0.00 2.22 0.75 0.86
6 B1 3238 3093 2.01 46.51 0.75 0.86
7 B1 824 787 4.29 0.93 0.75 0.86
8 B2 1237 1182 62.58 0.01 0.75 0.86
9 B2 684 654 83.44 6.15 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6249.0 cm-1
Scaled (by 0.9552) Zero Point Vibrational Energy (zpe) 5969.0 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 wB97X-D/Def2TZVPP
ABC
0.88938 0.04088 0.03938

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.928
H2 -0.896 0.000 1.535
H3 0.896 0.000 1.535
Br4 0.000 1.613 -0.123
Br5 0.000 -1.613 -0.123

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08181.08181.92581.9258
H21.08181.79112.48112.4811
H31.08181.79112.48112.4811
Br41.92582.48112.48113.2265
Br51.92582.48112.48113.2265

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 111.745 H2 C1 Br4 107.843
H2 C1 Br5 107.843 H3 C1 Br4 107.843
H3 C1 Br5 107.843 Br4 C1 Br5 113.794
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.203      
2 H 0.165      
3 H 0.165      
4 Br -0.063      
5 Br -0.063      


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 1.529 1.529
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.037 0.000 0.000
y 0.000 -44.545 0.000
z 0.000 0.000 -40.617
Traceless
 xyz
x -0.455 0.000 0.000
y 0.000 -2.718 0.000
z 0.000 0.000 3.174
Polar
3z2-r26.347
x2-y21.509
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.661 0.000 0.000
y 0.000 10.360 0.000
z 0.000 0.000 6.541


<r2> (average value of r2) Å2
<r2> 221.430
(<r2>)1/2 14.881