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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: PBEPBE/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 PBEPBE/Def2TZVPP
 hartrees
Energy at 0K-5186.804870
Energy at 298.15K 
HF Energy-5186.804870
Nuclear repulsion energy348.788896
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 PBEPBE/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 3061 3024 1.60 99.78 0.05 0.10
2 A1 1381 1364 0.00 11.66 0.65 0.79
3 A1 568 561 3.17 13.54 0.08 0.15
4 A1 164 162 0.07 4.98 0.41 0.58
5 A2 1072 1059 0.00 2.08 0.75 0.86
6 B1 3148 3110 1.55 48.92 0.75 0.86
7 B1 788 778 4.64 1.10 0.75 0.86
8 B2 1165 1151 55.76 0.15 0.75 0.86
9 B2 614 606 109.79 3.77 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5980.1 cm-1
Scaled (by 0.9879) Zero Point Vibrational Energy (zpe) 5907.7 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 PBEPBE/Def2TZVPP
ABC
0.88214 0.03997 0.03852

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.932
H2 -0.906 0.000 1.538
H3 0.906 0.000 1.538
Br4 0.000 1.632 -0.124
Br5 0.000 -1.632 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.09031.09031.94341.9434
H21.09031.81282.49912.4991
H31.09031.81282.49912.4991
Br41.94342.49912.49913.2630
Br51.94342.49912.49913.2630

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.469 H2 C1 Br4 107.577
H2 C1 Br5 107.577 H3 C1 Br4 107.577
H3 C1 Br5 107.577 Br4 C1 Br5 114.176
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.216      
2 H 0.178      
3 H 0.178      
4 Br -0.070      
5 Br -0.070      


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 1.446 1.446
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.216 0.000 0.000
y 0.000 -44.553 0.000
z 0.000 0.000 -40.868
Traceless
 xyz
x -0.506 0.000 0.000
y 0.000 -2.511 0.000
z 0.000 0.000 3.017
Polar
3z2-r26.034
x2-y21.337
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.838 0.000 0.000
y 0.000 11.005 0.000
z 0.000 0.000 6.731


<r2> (average value of r2) Å2
<r2> 225.768
(<r2>)1/2 15.026