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

using model chemistry: MP2/TZVP

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/TZVP
 hartrees
Energy at 0K-2612.420692
Energy at 298.15K-2612.426510
HF Energy-2612.040199
Nuclear repulsion energy89.125317
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/TZVP
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 3140 2976 17.63      
2 A1 1383 1311 29.15      
3 A1 635 602 10.67      
4 E 3262 3092 2.58      
4 E 3262 3092 2.58      
5 E 1497 1419 4.76      
5 E 1497 1419 4.76      
6 E 989 938 4.59      
6 E 989 938 4.59      

Unscaled Zero Point Vibrational Energy (zpe) 8327.1 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 7893.3 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/TZVP
ABC
5.25220 0.31896 0.31896

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/TZVP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.522
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
C11.94241.08331.08331.0833
Br21.94242.49932.49932.4993
H31.08332.49931.78461.7846
H41.08332.49931.78461.7846
H51.08332.49931.78461.7846

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 107.993 Br2 C1 H4 107.993
Br2 C1 H5 107.993 H3 C1 H4 110.908
H3 C1 H5 110.908 H4 C1 H5 110.908
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability