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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/6-31G**
 hartrees
Energy at 0K-5181.849190
Energy at 298.15K 
HF Energy-5181.849190
Nuclear repulsion energy348.757924
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 PBEPBEultrafine/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 3077 3035 2.10 90.23 0.08 0.15
2 A1 1396 1377 0.15 13.14 0.74 0.85
3 A1 568 560 4.22 12.63 0.08 0.15
4 A1 170 168 0.07 5.31 0.43 0.61
5 A2 1081 1066 0.00 7.52 0.75 0.86
6 B1 3172 3129 0.64 55.54 0.75 0.86
7 B1 783 772 5.10 2.65 0.75 0.86
8 B2 1174 1158 63.29 2.39 0.75 0.86
9 B2 606 598 113.48 2.94 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6013.6 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 5931.2 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 PBEPBEultrafine/6-31G**
ABC
0.86394 0.04011 0.03862

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.944
H2 -0.911 0.000 1.550
H3 0.911 0.000 1.550
Br4 0.000 1.629 -0.125
Br5 0.000 -1.629 -0.125

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.09381.09381.94811.9481
H21.09381.82132.50742.5074
H31.09381.82132.50742.5074
Br41.94812.50742.50743.2571
Br51.94812.50742.50743.2571

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.719 H2 C1 Br4 107.698
H2 C1 Br5 107.698 H3 C1 Br4 107.698
H3 C1 Br5 107.698 Br4 C1 Br5 113.436
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.283      
2 H 0.207      
3 H 0.207      
4 Br -0.065      
5 Br -0.065      


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 1.494 1.494
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.617 0.000 0.000
y 0.000 -43.685 0.000
z 0.000 0.000 -40.081
Traceless
 xyz
x -0.734 0.000 0.000
y 0.000 -2.336 0.000
z 0.000 0.000 3.070
Polar
3z2-r26.140
x2-y21.068
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.667 0.000 0.000
y 0.000 9.433 0.000
z 0.000 0.000 5.507


<r2> (average value of r2) Å2
<r2> 224.866
(<r2>)1/2 14.996