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

using model chemistry: MP2/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2/6-31G**
 hartrees
Energy at 0K-2609.768742
Energy at 298.15K 
HF Energy-2609.505809
Nuclear repulsion energy88.944544
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 MP2/6-31G**
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 3177 2976 15.23      
2 A1 1394 1306 27.79      
3 A1 632 592 11.32      
4 E 3306 3096 2.34      
4 E 3306 3096 2.34      
5 E 1540 1442 4.08      
5 E 1540 1442 4.08      
6 E 1003 939 4.75      
6 E 1003 939 4.75      

Unscaled Zero Point Vibrational Energy (zpe) 8450.3 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 7913.7 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 MP2/6-31G**
ABC
5.24427 0.31750 0.31750

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.527
Br2 0.000 0.000 0.421
H3 0.000 1.031 -1.858
H4 0.893 -0.516 -1.858
H5 -0.893 -0.516 -1.858

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94791.08311.08311.0831
Br21.94792.50172.50172.5017
H31.08312.50171.78591.7859
H41.08312.50171.78591.7859
H51.08312.50171.78591.7859

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 107.821 Br2 C1 H4 107.821
Br2 C1 H5 107.821 H3 C1 H4 111.070
H3 C1 H5 111.070 H4 C1 H5 111.070
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability