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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: PBEPBEultrafine/TZVP

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/TZVP
 hartrees
Energy at 0K-5186.796562
Energy at 298.15K 
HF Energy-5186.796562
Nuclear repulsion energy347.068691
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/TZVP
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 3068 3033 1.87 102.04 0.07 0.13
2 A1 1384 1368 0.05 17.23 0.65 0.79
3 A1 560 554 3.79 12.34 0.11 0.20
4 A1 164 162 0.06 6.79 0.48 0.65
5 A2 1074 1061 0.00 4.89 0.75 0.86
6 B1 3156 3120 1.37 55.76 0.75 0.86
7 B1 789 780 6.06 2.72 0.75 0.86
8 B2 1178 1164 73.39 2.62 0.75 0.86
9 B2 602 595 125.72 5.09 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5987.0 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 5918.7 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 PBEPBEultrafine/TZVP
ABC
0.88187 0.03950 0.03809

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.932
H2 -0.907 0.000 1.538
H3 0.907 0.000 1.538
Br4 0.000 1.641 -0.124
Br5 0.000 -1.641 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.09091.09091.95151.9515
H21.09091.81402.50582.5058
H31.09091.81402.50582.5058
Br41.95152.50582.50583.2822
Br51.95152.50582.50583.2822

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.486 H2 C1 Br4 107.499
H2 C1 Br5 107.499 H3 C1 Br4 107.499
H3 C1 Br5 107.499 Br4 C1 Br5 114.478
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.227      
2 H 0.184      
3 H 0.184      
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 1.536 1.536
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.385 0.000 0.000
y 0.000 -44.598 0.000
z 0.000 0.000 -40.921
Traceless
 xyz
x -0.625 0.000 0.000
y 0.000 -2.445 0.000
z 0.000 0.000 3.071
Polar
3z2-r26.141
x2-y21.213
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.602 0.000 0.000
y 0.000 10.254 0.000
z 0.000 0.000 5.687


<r2> (average value of r2) Å2
<r2> 228.028
(<r2>)1/2 15.101