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

using model chemistry: CCD/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 CCD/3-21G
 hartrees
Energy at 0K-2599.599945
Energy at 298.15K 
HF Energy-2599.448526
Nuclear repulsion energy86.395999
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/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 3103 3017 13.31      
2 A1 1402 1363 17.22      
3 A1 587 570 7.19      
4 E 3202 3113 6.44      
4 E 3202 3113 6.44      
5 E 1552 1509 8.01      
5 E 1552 1509 8.01      
6 E 977 950 6.99      
6 E 977 950 6.99      

Unscaled Zero Point Vibrational Energy (zpe) 8275.7 cm-1
Scaled (by 0.9723) Zero Point Vibrational Energy (zpe) 8046.4 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/3-21G
ABC
5.16394 0.29772 0.29772

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.581
Br2 0.000 0.000 0.435
H3 0.000 1.039 -1.912
H4 0.900 -0.520 -1.912
H5 -0.900 -0.520 -1.912

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C12.01561.09061.09061.0906
Br22.01562.56672.56672.5667
H31.09062.56671.79981.7998
H41.09062.56671.79981.7998
H51.09062.56671.79981.7998

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 107.686 Br2 C1 H4 107.686
Br2 C1 H5 107.686 H3 C1 H4 111.196
H3 C1 H5 111.196 H4 C1 H5 111.196
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability