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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: B3PW91/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/6-31+G**
 hartrees
Energy at 0K-5182.701284
Energy at 298.15K 
HF Energy-5182.701284
Nuclear repulsion energy351.955036
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 B3PW91/6-31+G**
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 3154 3028 1.32      
2 A1 1446 1388 0.01      
3 A1 590 566 4.22      
4 A1 174 167 0.09      
5 A2 1143 1098 0.00      
6 B1 3248 3118 3.01      
7 B1 835 802 4.98      
8 B2 1241 1192 78.12      
9 B2 645 619 107.34      

Unscaled Zero Point Vibrational Energy (zpe) 6237.6 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 5988.8 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 B3PW91/6-31+G**
ABC
0.87359 0.04090 0.03937

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.939
H2 -0.903 0.000 1.543
H3 0.903 0.000 1.543
Br4 0.000 1.613 -0.125
Br5 0.000 -1.613 -0.125

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08621.08621.93161.9316
H21.08621.80522.48912.4891
H31.08621.80522.48912.4891
Br41.93162.48912.48913.2253
Br51.93162.48912.48913.2253

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.401 H2 C1 Br4 107.829
H2 C1 Br5 107.829 H3 C1 Br4 107.829
H3 C1 Br5 107.829 Br4 C1 Br5 113.211
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.304      
2 H 0.228      
3 H 0.228      
4 Br -0.076      
5 Br -0.076      


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 1.609 1.609
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.345 0.000 0.000
y 0.000 -44.779 0.000
z 0.000 0.000 -40.641
Traceless
 xyz
x -0.635 0.000 0.000
y 0.000 -2.786 0.000
z 0.000 0.000 3.420
Polar
3z2-r26.841
x2-y21.434
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.561 0.000 0.000
y 0.000 10.060 0.000
z 0.000 0.000 6.237


<r2> (average value of r2) Å2
<r2> 221.615
(<r2>)1/2 14.887