return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: TPSSh/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at TPSSh/6-31G*
 hartrees
Energy at 0K-5182.465368
Energy at 298.15K-5182.473351
HF Energy-5182.465368
Nuclear repulsion energy350.069111
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 TPSSh/6-31G*
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 3168 3039 2.98      
2 A1 1473 1413 0.74      
3 A1 579 556 5.46      
4 A1 171 164 0.10      
5 A2 1125 1080 0.00      
6 B1 3263 3130 0.35      
7 B1 811 778 4.69      
8 B2 1229 1179 78.89      
9 B2 617 592 112.78      

Unscaled Zero Point Vibrational Energy (zpe) 6218.2 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 5965.8 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 TPSSh/6-31G*
ABC
0.86692 0.04044 0.03893

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.942
H2 -0.900 0.000 1.552
H3 0.900 0.000 1.552
Br4 0.000 1.621 -0.125
Br5 0.000 -1.621 -0.125

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08721.08721.94081.9408
H21.08721.80002.50012.5001
H31.08721.80002.50012.5001
Br41.94082.50012.50013.2423
Br51.94082.50012.50013.2423

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 111.742 H2 C1 Br4 107.967
H2 C1 Br5 107.967 H3 C1 Br4 107.967
H3 C1 Br5 107.967 Br4 C1 Br5 113.291
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.358      
2 H 0.250      
3 H 0.250      
4 Br -0.071      
5 Br -0.071      


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 1.581 1.581
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.600 0.000 0.000
y 0.000 9.226 0.000
z 0.000 0.000 5.439


<r2> (average value of r2) Å2
<r2> 223.334
(<r2>)1/2 14.944