return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: MP2=FULL/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2=FULL/6-311+G(3df,2p)
 hartrees
Energy at 0K-5185.194700
Energy at 298.15K 
HF Energy-5183.786927
Nuclear repulsion energy354.895238
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 MP2=FULL/6-311+G(3df,2p)
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 3167 2985 0.80 86.97 0.05 0.09
2 A1 1471 1386 0.04 9.42 0.52 0.69
3 A1 617 581 2.77 15.62 0.05 0.10
4 A1 180 169 0.07 2.89 0.35 0.52
5 A2 1155 1089 0.00 1.09 0.75 0.86
6 B1 3253 3066 3.77 41.75 0.75 0.86
7 B1 843 794 4.00 0.32 0.75 0.86
8 B2 1249 1177 54.62 0.22 0.75 0.86
9 B2 707 666 70.34 4.54 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6319.4 cm-1
Scaled (by 0.9427) Zero Point Vibrational Energy (zpe) 5957.3 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 MP2=FULL/6-311+G(3df,2p)
ABC
0.88972 0.04158 0.04003

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-311+G(3df,2p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.928
H2 -0.895 0.000 1.535
H3 0.895 0.000 1.535
Br4 0.000 1.599 -0.123
Br5 0.000 -1.599 -0.123

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08101.08101.91421.9142
H21.08101.78972.47162.4716
H31.08101.78972.47162.4716
Br41.91422.47162.47163.1989
Br51.91422.47162.47163.1989

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 111.741 H2 C1 Br4 107.954
H2 C1 Br5 107.954 H3 C1 Br4 107.954
H3 C1 Br5 107.954 Br4 C1 Br5 113.346
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability