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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: PBEPBE/6-311+G(3df,2p)

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/6-311+G(3df,2p)
 hartrees
Energy at 0K-5186.740728
Energy at 298.15K 
HF Energy-5186.740728
Nuclear repulsion energy348.698579
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/6-311+G(3df,2p)
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 3058 3033 0.82 90.61 0.05 0.09
2 A1 1382 1371 0.05 10.93 0.51 0.68
3 A1 568 563 2.83 17.17 0.06 0.10
4 A1 164 163 0.06 4.21 0.35 0.52
5 A2 1074 1065 0.00 0.94 0.75 0.86
6 B1 3144 3119 2.79 45.16 0.75 0.86
7 B1 790 783 4.05 0.36 0.75 0.86
8 B2 1167 1157 54.09 0.03 0.75 0.86
9 B2 613 608 111.74 2.88 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5979.7 cm-1
Scaled (by 0.9918) Zero Point Vibrational Energy (zpe) 5930.7 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/6-311+G(3df,2p)
ABC
0.88148 0.03995 0.03850

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311+G(3df,2p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.933
H2 -0.907 0.000 1.538
H3 0.907 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
C11.08991.08991.94411.9441
H21.08991.81322.49922.4992
H31.08991.81322.49922.4992
Br41.94412.49922.49923.2638
Br51.94412.49922.49923.2638

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.569 H2 C1 Br4 107.559
H2 C1 Br5 107.559 H3 C1 Br4 107.559
H3 C1 Br5 107.559 Br4 C1 Br5 114.156
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.318      
2 H 0.189      
3 H 0.189      
4 Br -0.030      
5 Br -0.030      


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 1.431 1.431
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.450 0.000 0.000
y 0.000 -44.773 0.000
z 0.000 0.000 -41.047
Traceless
 xyz
x -0.540 0.000 0.000
y 0.000 -2.525 0.000
z 0.000 0.000 3.064
Polar
3z2-r26.129
x2-y21.323
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.939 0.000 0.000
y 0.000 11.818 0.000
z 0.000 0.000 7.565


<r2> (average value of r2) Å2
<r2> 225.998
(<r2>)1/2 15.033