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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: HF/CEP-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 HF/CEP-31G
 hartrees
Energy at 0K-32.886345
Energy at 298.15K 
HF Energy-32.886345
Nuclear repulsion energy32.976493
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 HF/CEP-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 3349 3019 19.54 150.89 0.07 0.13
2 A1 1563 1409 1.86 29.79 0.54 0.71
3 A1 590 532 8.87 46.07 0.13 0.23
4 A1 179 161 0.18 10.55 0.55 0.71
5 A2 1222 1101 0.00 21.55 0.75 0.86
6 B1 3465 3123 1.38 80.20 0.75 0.86
7 B1 895 807 8.87 8.33 0.75 0.86
8 B2 1362 1227 138.72 0.12 0.75 0.86
9 B2 678 611 126.47 30.42 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6651.5 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 5995.7 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 HF/CEP-31G
ABC
0.85802 0.03896 0.03754

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.951
H2 -0.896 0.000 1.550
H3 0.896 0.000 1.550
Br4 0.000 1.653 -0.126
Br5 0.000 -1.653 -0.126

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.07761.07761.97251.9725
H21.07761.79232.51812.5181
H31.07761.79232.51812.5181
Br41.97252.51812.51813.3052
Br51.97252.51812.51813.3052

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.533 H2 C1 Br4 107.649
H2 C1 Br5 107.649 H3 C1 Br4 107.649
H3 C1 Br5 107.649 Br4 C1 Br5 113.819
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.565      
2 H 0.226      
3 H 0.226      
4 Br 0.057      
5 Br 0.057      


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 2.053 2.053
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -36.823 0.000 0.000
y 0.000 -40.194 0.000
z 0.000 0.000 -34.345
Traceless
 xyz
x 0.446 0.000 0.000
y 0.000 -4.610 0.000
z 0.000 0.000 4.164
Polar
3z2-r28.328
x2-y23.371
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.100 0.000 0.000
y 0.000 8.997 0.000
z 0.000 0.000 3.909


<r2> (average value of r2) Å2
<r2> 71.669
(<r2>)1/2 8.466