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

using model chemistry: MP2=FULL/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=FULL/aug-cc-pVQZ
 hartrees
Energy at 0K-2612.713393
Energy at 298.15K 
HF Energy-2612.097951
Nuclear repulsion energy90.360804
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/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 3132 2996 15.16 146.94 0.00 0.00
2 A1 1357 1298 14.77 1.44 0.09 0.17
3 A1 669 640 8.28 20.50 0.15 0.27
4 E 3250 3108 0.44 47.85 0.75 0.86
4 E 3250 3108 0.44 47.85 0.75 0.86
5 E 1501 1435 5.89 3.36 0.75 0.86
5 E 1501 1435 5.89 3.36 0.75 0.86
6 E 983 941 3.87 0.25 0.75 0.86
6 E 983 941 3.87 0.25 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8313.2 cm-1
Scaled (by 0.9564) Zero Point Vibrational Energy (zpe) 7950.7 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 MP2=FULL/aug-cc-pVQZ
ABC
5.30258 0.32873 0.32873

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.497
Br2 0.000 0.000 0.414
H3 0.000 1.025 -1.834
H4 0.888 -0.513 -1.834
H5 -0.888 -0.513 -1.834

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.91101.07931.07931.0793
Br21.91102.47052.47052.4705
H31.07932.47051.77611.7761
H41.07932.47051.77611.7761
H51.07932.47051.77611.7761

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 108.174 Br2 C1 H4 108.174
Br2 C1 H5 108.174 H3 C1 H4 110.737
H3 C1 H5 110.737 H4 C1 H5 110.737
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability