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All results from a given calculation for CH3Br (methyl bromide)

using model chemistry: MP2/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2/aug-cc-pVQZ
 hartrees
Energy at 0K-2612.600868
Energy at 298.15K 
HF Energy-2612.098011
Nuclear repulsion energy90.090245
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/aug-cc-pVQZ
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 3121 2964 15.38 148.07 0.00 0.00
2 A1 1353 1285 15.91 1.43 0.10 0.17
3 A1 660 627 9.11 20.96 0.15 0.27
4 E 3239 3076 0.54 48.13 0.75 0.86
4 E 3239 3076 0.54 48.13 0.75 0.86
5 E 1497 1422 5.59 3.39 0.75 0.86
5 E 1497 1422 5.59 3.39 0.75 0.86
6 E 984 934 3.64 0.27 0.75 0.86
6 E 984 934 3.64 0.27 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8286.3 cm-1
Scaled (by 0.9497) Zero Point Vibrational Energy (zpe) 7869.5 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 MP2/aug-cc-pVQZ
ABC
5.27279 0.32672 0.32672

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVQZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.502
Br2 0.000 0.000 0.415
H3 0.000 1.028 -1.838
H4 0.891 -0.514 -1.838
H5 -0.891 -0.514 -1.838

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.91741.08171.08171.0817
Br21.91742.47672.47672.4767
H31.08172.47671.78111.7811
H41.08172.47671.78111.7811
H51.08172.47671.78111.7811

picture of methyl bromide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 108.081 Br2 C1 H4 108.081
Br2 C1 H5 108.081 H3 C1 H4 110.825
H3 C1 H5 110.825 H4 C1 H5 110.825
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability