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

using model chemistry: MP2/cc-pVTZ-PP

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/cc-pVTZ-PP
 hartrees
Energy at 0K-455.545780
Energy at 298.15K 
HF Energy-455.137270
Nuclear repulsion energy66.920993
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/cc-pVTZ-PP
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 3119 3119 15.95 128.36 0.00 0.00
2 A1 1350 1350 19.48 0.03 0.05 0.10
3 A1 652 652 8.68 19.00 0.22 0.36
4 E 3236 3236 1.34 51.81 0.75 0.86
4 E 3236 3236 1.34 51.81 0.75 0.86
5 E 1494 1494 4.98 6.23 0.75 0.86
5 E 1494 1494 4.98 6.23 0.75 0.86
6 E 978 978 4.47 1.99 0.75 0.86
6 E 978 978 4.47 1.99 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8269.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8269.2 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/cc-pVTZ-PP
ABC
5.26643 0.32453 0.32453

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.507
Br2 0.000 0.000 0.417
H3 0.000 1.029 -1.845
H4 0.891 -0.514 -1.845
H5 -0.891 -0.514 -1.845

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.92391.08281.08281.0828
Br21.92392.48432.48432.4843
H31.08282.48431.78221.7822
H41.08282.48431.78221.7822
H51.08282.48431.78221.7822

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 108.148 Br2 C1 H4 108.148
Br2 C1 H5 108.148 H3 C1 H4 110.761
H3 C1 H5 110.761 H4 C1 H5 110.761
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability