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

using model chemistry: B2PLYP=FULLultrafine/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B2PLYP=FULLultrafine/3-21G*
 hartrees
Energy at 0K-2601.208179
Energy at 298.15K 
HF Energy-2601.130274
Nuclear repulsion energy88.333803
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 B2PLYP=FULLultrafine/3-21G*
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 3122 3122 14.22 95.57 0.00 0.01
2 A1 1408 1408 17.19 1.73 0.60 0.75
3 A1 623 623 11.11 17.79 0.29 0.45
4 E 3222 3222 3.61 55.60 0.75 0.86
4 E 3222 3222 3.61 55.60 0.75 0.86
5 E 1564 1564 7.88 18.37 0.75 0.86
5 E 1564 1564 7.88 18.37 0.75 0.86
6 E 998 998 7.83 7.52 0.75 0.86
6 E 998 998 7.83 7.52 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8358.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8358.8 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 B2PLYP=FULLultrafine/3-21G*
ABC
5.21094 0.31286 0.31286

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.538
Br2 0.000 0.000 0.424
H3 0.000 1.034 -1.873
H4 0.896 -0.517 -1.873
H5 -0.896 -0.517 -1.873

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.96241.08711.08711.0871
Br21.96242.51902.51902.5190
H31.08712.51901.79161.7916
H41.08712.51901.79161.7916
H51.08712.51901.79161.7916

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 107.917 Br2 C1 H4 107.917
Br2 C1 H5 107.917 H3 C1 H4 110.980
H3 C1 H5 110.980 H4 C1 H5 110.980
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability