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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: B3PW91/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 B3PW91/TZVP
 hartrees
Energy at 0K-5187.632751
Energy at 298.15K 
HF Energy-5187.632751
Nuclear repulsion energy349.887848
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 B3PW91/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 3145 3032 1.95 98.06 0.07 0.13
2 A1 1433 1382 0.04 17.00 0.64 0.78
3 A1 583 562 4.54 12.67 0.11 0.20
4 A1 170 164 0.08 5.79 0.49 0.66
5 A2 1119 1079 0.00 4.86 0.75 0.86
6 B1 3234 3118 1.67 54.34 0.75 0.86
7 B1 815 786 5.62 2.47 0.75 0.86
8 B2 1226 1182 79.88 1.66 0.75 0.86
9 B2 643 620 110.89 6.94 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6183.3 cm-1
Scaled (by 0.9643) Zero Point Vibrational Energy (zpe) 5962.5 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 B3PW91/TZVP
ABC
0.89047 0.04019 0.03875

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.928
H2 -0.899 0.000 1.532
H3 0.899 0.000 1.532
Br4 0.000 1.627 -0.123
Br5 0.000 -1.627 -0.123

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08331.08331.93691.9369
H21.08331.79782.48922.4892
H31.08331.79782.48922.4892
Br41.93692.48922.48923.2539
Br51.93692.48922.48923.2539

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.158 H2 C1 Br4 107.628
H2 C1 Br5 107.628 H3 C1 Br4 107.628
H3 C1 Br5 107.628 Br4 C1 Br5 114.270
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.197      
2 H 0.180      
3 H 0.180      
4 Br -0.081      
5 Br -0.081      


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 1.602 1.602
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.108 0.000 0.000
y 0.000 -44.529 0.000
z 0.000 0.000 -40.615
Traceless
 xyz
x -0.536 0.000 0.000
y 0.000 -2.668 0.000
z 0.000 0.000 3.204
Polar
3z2-r26.407
x2-y21.421
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.481 0.000 0.000
y 0.000 9.749 0.000
z 0.000 0.000 5.540


<r2> (average value of r2) Å2
<r2> 224.524
(<r2>)1/2 14.984