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

using model chemistry: MP2=FULL/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-2609.817114
Energy at 298.15K 
HF Energy-2609.519715
Nuclear repulsion energy89.094593
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/6-31+G**
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 3171 2978 17.31      
2 A1 1400 1315 28.86      
3 A1 633 594 11.08      
4 E 3299 3099 1.48      
4 E 3299 3099 1.48      
5 E 1525 1432 5.07      
5 E 1525 1432 5.07      
6 E 1010 948 4.57      
6 E 1010 948 4.57      

Unscaled Zero Point Vibrational Energy (zpe) 8435.8 cm-1
Scaled (by 0.9392) Zero Point Vibrational Energy (zpe) 7922.9 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/6-31+G**
ABC
5.25619 0.31866 0.31866

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31+G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.523
Br2 0.000 0.000 0.420
H3 0.000 1.030 -1.857
H4 0.892 -0.515 -1.857
H5 -0.892 -0.515 -1.857

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94361.08261.08261.0826
Br21.94362.49932.49932.4993
H31.08262.49931.78391.7839
H41.08262.49931.78391.7839
H51.08262.49931.78391.7839

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 107.949 Br2 C1 H4 107.949
Br2 C1 H5 107.949 H3 C1 H4 110.949
H3 C1 H5 110.949 H4 C1 H5 110.949
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability