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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: TPSSh/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-5187.556564
Energy at 298.15K-5187.564559
HF Energy-5187.556564
Nuclear repulsion energy349.992971
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/cc-pVTZ
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 3132 3033 2.04      
2 A1 1442 1396 0.10      
3 A1 580 561 4.27      
4 A1 165 160 0.11      
5 A2 1110 1075 0.00      
6 B1 3220 3118 1.17      
7 B1 815 789 3.87      
8 B2 1210 1172 69.35      
9 B2 627 608 111.38      

Unscaled Zero Point Vibrational Energy (zpe) 6150.7 cm-1
Scaled (by 0.9683) Zero Point Vibrational Energy (zpe) 5955.7 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 TPSSh/cc-pVTZ
ABC
0.88450 0.04027 0.03881

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.935
H2 -0.896 0.000 1.545
H3 0.896 0.000 1.545
Br4 0.000 1.621 -0.124
Br5 0.000 -1.621 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08401.08401.93651.9365
H21.08401.79222.49332.4933
H31.08401.79222.49332.4933
Br41.93652.49332.49333.2425
Br51.93652.49332.49333.2425

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 111.518 H2 C1 Br4 107.921
H2 C1 Br5 107.921 H3 C1 Br4 107.921
H3 C1 Br5 107.921 Br4 C1 Br5 113.694
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.115      
2 H 0.132      
3 H 0.132      
4 Br -0.074      
5 Br -0.074      


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 1.545 1.545
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 5.173 0.000 0.000
y 0.000 10.364 0.000
z 0.000 0.000 6.175


<r2> (average value of r2) Å2
<r2> 224.238
(<r2>)1/2 14.975