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All results from a given calculation for CH2Br2 (dibromomethane)

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

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/6-31G**
 hartrees
Energy at 0K-5182.671108
Energy at 298.15K 
HF Energy-5182.671108
Nuclear repulsion energy351.440921
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 B3PW91/6-31G**
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 3156 3025 2.16      
2 A1 1444 1384 0.09      
3 A1 590 566 4.81      
4 A1 176 169 0.09      
5 A2 1126 1079 0.00      
6 B1 3253 3118 1.01      
7 B1 810 776 5.08      
8 B2 1223 1172 66.56      
9 B2 642 615 101.35      

Unscaled Zero Point Vibrational Energy (zpe) 6210.2 cm-1
Scaled (by 0.9584) Zero Point Vibrational Energy (zpe) 5951.9 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 B3PW91/6-31G**
ABC
0.87443 0.04075 0.03924

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.938
H2 -0.903 0.000 1.541
H3 0.903 0.000 1.541
Br4 0.000 1.616 -0.124
Br5 0.000 -1.616 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08571.08571.93381.9338
H21.08571.80562.49012.4901
H31.08571.80562.49012.4901
Br41.93382.49012.49013.2313
Br51.93382.49012.49013.2313

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.504 H2 C1 Br4 107.776
H2 C1 Br5 107.776 H3 C1 Br4 107.776
H3 C1 Br5 107.776 Br4 C1 Br5 113.329
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.291      
2 H 0.218      
3 H 0.218      
4 Br -0.072      
5 Br -0.072      


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 1.556 1.556
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.542 0.000 0.000
y 0.000 -43.787 0.000
z 0.000 0.000 -39.972
Traceless
 xyz
x -0.662 0.000 0.000
y 0.000 -2.531 0.000
z 0.000 0.000 3.192
Polar
3z2-r26.385
x2-y21.246
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.603 0.000 0.000
y 0.000 9.096 0.000
z 0.000 0.000 5.431


<r2> (average value of r2) Å2
<r2> 221.761
(<r2>)1/2 14.892