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

using model chemistry: QCISD/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at QCISD/6-311G*
 hartrees
Energy at 0K-2612.281169
Energy at 298.15K 
HF Energy-2611.989535
Nuclear repulsion energy88.742013
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 QCISD/6-311G*
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 3090 2958 20.95      
2 A1 1388 1329 22.26      
3 A1 623 596 10.52      
4 E 3197 3061 5.38      
4 E 3197 3061 5.38      
5 E 1507 1442 6.64      
5 E 1507 1442 6.64      
6 E 996 953 7.25      
6 E 996 953 7.25      

Unscaled Zero Point Vibrational Energy (zpe) 8249.2 cm-1
Scaled (by 0.9574) Zero Point Vibrational Energy (zpe) 7897.8 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 QCISD/6-311G*
ABC
5.20877 0.31627 0.31627

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.528
Br2 0.000 0.000 0.422
H3 0.000 1.035 -1.868
H4 0.896 -0.517 -1.868
H5 -0.896 -0.517 -1.868

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94961.08921.08921.0892
Br21.94962.51292.51292.5129
H31.08922.51291.79201.7920
H41.08922.51291.79201.7920
H51.08922.51291.79201.7920

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 108.215 Br2 C1 H4 108.215
Br2 C1 H5 108.215 H3 C1 H4 110.698
H3 C1 H5 110.698 H4 C1 H5 110.698
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability