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: B2PLYP=FULL/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 B2PLYP=FULL/cc-pVTZ
 hartrees
Energy at 0K-5186.921073
Energy at 298.15K 
HF Energy-5186.684607
Nuclear repulsion energy351.056131
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 B2PLYP=FULL/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 3159 3019 1.97 91.01 0.06 0.11
2 A1 1453 1389 0.03 10.84 0.63 0.77
3 A1 588 562 3.70 15.03 0.07 0.14
4 A1 172 164 0.08 4.40 0.43 0.60
5 A2 1128 1079 0.00 3.07 0.75 0.86
6 B1 3238 3095 1.48 46.08 0.75 0.86
7 B1 823 787 4.24 1.21 0.75 0.86
8 B2 1229 1174 66.89 0.03 0.75 0.86
9 B2 656 627 92.23 5.44 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6222.6 cm-1
Scaled (by 0.9558) Zero Point Vibrational Energy (zpe) 5947.5 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 B2PLYP=FULL/cc-pVTZ
ABC
0.88509 0.04055 0.03907

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.932
H2 -0.895 0.000 1.534
H3 0.895 0.000 1.534
Br4 0.000 1.620 -0.124
Br5 0.000 -1.620 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.07851.07851.93361.9336
H21.07851.79092.48442.4844
H31.07851.79092.48442.4844
Br41.93362.48442.48443.2394
Br51.93362.48442.48443.2394

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.246 H2 C1 Br4 107.726
H2 C1 Br5 107.726 H3 C1 Br4 107.726
H3 C1 Br5 107.726 Br4 C1 Br5 113.785
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability