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-5182.468269
Energy at 298.15K 
HF Energy-5182.468269
Nuclear repulsion energy350.182213
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 3153 3023 2.78 92.85 0.08 0.15
2 A1 1456 1396 0.66 12.73 0.74 0.85
3 A1 579 555 5.49 13.88 0.09 0.16
4 A1 172 165 0.11 4.95 0.44 0.61
5 A2 1120 1073 0.00 7.12 0.75 0.86
6 B1 3251 3117 0.51 58.03 0.75 0.86
7 B1 806 773 4.50 2.53 0.75 0.86
8 B2 1219 1169 75.38 1.43 0.75 0.86
9 B2 623 597 111.54 4.47 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6188.9 cm-1
Scaled (by 0.9587) Zero Point Vibrational Energy (zpe) 5933.3 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
0.86594 0.04048 0.03896

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 0.945
H2 -0.905 0.000 1.543
H3 0.905 0.000 1.543
Br4 0.000 1.621 -0.125
Br5 0.000 -1.621 -0.125

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08461.08461.94241.9424
H21.08461.80942.49592.4959
H31.08461.80942.49592.4959
Br41.94242.49592.49593.2424
Br51.94242.49592.49593.2424

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 113.043 H2 C1 Br4 107.688
H2 C1 Br5 107.688 H3 C1 Br4 107.688
H3 C1 Br5 107.688 Br4 C1 Br5 113.155
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 -0.273      
2 H 0.214      
3 H 0.214      
4 Br -0.077      
5 Br -0.077      


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 1.582 1.582
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 4.623 0.000 0.000
y 0.000 9.248 0.000
z 0.000 0.000 5.469


<r2> (average value of r2) Å2
<r2> 223.163
(<r2>)1/2 14.939