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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: HF/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/aug-cc-pVQZ
 hartrees
Energy at 0K-5183.972217
Energy at 298.15K 
HF Energy-5183.972217
Nuclear repulsion energy352.898434
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 HF/aug-cc-pVQZ
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 3292 2991 2.63 87.34 0.06 0.11
2 A1 1569 1426 0.08 11.04 0.45 0.62
3 A1 625 568 6.41 26.73 0.09 0.16
4 A1 186 169 0.13 3.43 0.31 0.48
5 A2 1227 1115 0.00 0.92 0.75 0.86
6 B1 3378 3069 2.15 42.70 0.75 0.86
7 B1 891 809 2.94 0.30 0.75 0.86
8 B2 1343 1220 89.79 1.91 0.75 0.86
9 B2 718 652 94.39 9.95 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6614.0 cm-1
Scaled (by 0.9085) Zero Point Vibrational Energy (zpe) 6008.8 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 HF/aug-cc-pVQZ
ABC
0.89145 0.04100 0.03949

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/aug-cc-pVQZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.929
H2 -0.887 0.000 1.529
H3 0.887 0.000 1.529
Br4 0.000 1.611 -0.123
Br5 0.000 -1.611 -0.123

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.07081.07081.92441.9244
H21.07081.77402.47252.4725
H31.07081.77402.47252.4725
Br41.92442.47252.47253.2217
Br51.92442.47252.47253.2217

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 111.855 H2 C1 Br4 107.849
H2 C1 Br5 107.849 H3 C1 Br4 107.849
H3 C1 Br5 107.849 Br4 C1 Br5 113.663
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/aug-cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.682      
2 H 0.307      
3 H 0.307      
4 Br 0.034      
5 Br 0.034      


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 1.676 1.676
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.502 0.000 0.000
y 0.000 -45.614 0.000
z 0.000 0.000 -40.973
Traceless
 xyz
x -0.208 0.000 0.000
y 0.000 -3.376 0.000
z 0.000 0.000 3.585
Polar
3z2-r27.169
x2-y22.112
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.604 0.000 0.000
y 0.000 10.815 0.000
z 0.000 0.000 7.272


<r2> (average value of r2) Å2
<r2> 221.220
(<r2>)1/2 14.873