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

using model chemistry: CCD/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at CCD/aug-cc-pVTZ
 hartrees
Energy at 0K-2612.534995
Energy at 298.15K 
HF Energy-2612.092948
Nuclear repulsion energy89.559766
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 CCD/aug-cc-pVTZ
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 3110 2976 16.84      
2 A1 1372 1313 17.97      
3 A1 647 619 9.23      
4 E 3217 3079 1.49      
4 E 3217 3079 1.49      
5 E 1507 1442 5.18      
5 E 1507 1442 5.18      
6 E 992 949 3.10      
6 E 992 949 3.10      

Unscaled Zero Point Vibrational Energy (zpe) 8281.0 cm-1
Scaled (by 0.957) Zero Point Vibrational Energy (zpe) 7924.9 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 CCD/aug-cc-pVTZ
ABC
5.24769 0.32255 0.32255

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.513
Br2 0.000 0.000 0.418
H3 0.000 1.031 -1.848
H4 0.893 -0.515 -1.848
H5 -0.893 -0.515 -1.848

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.93081.08371.08371.0837
Br21.93082.48882.48882.4888
H31.08372.48881.78531.7853
H41.08372.48881.78531.7853
H51.08372.48881.78531.7853

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 107.982 Br2 C1 H4 107.982
Br2 C1 H5 107.982 H3 C1 H4 110.918
H3 C1 H5 110.918 H4 C1 H5 110.918
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability