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

using model chemistry: CISD/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 CISD/6-311G*
 hartrees
Energy at 0K-2612.257225
Energy at 298.15K 
HF Energy-2611.989746
Nuclear repulsion energy89.060956
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 CISD/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 3146 2911 21.18      
2 A1 1413 1307 24.09      
3 A1 638 591 12.11      
4 E 3254 3011 4.98      
4 E 3254 3011 4.98      
5 E 1533 1418 6.87      
5 E 1533 1418 6.87      
6 E 1014 938 7.31      
6 E 1014 938 7.31      

Unscaled Zero Point Vibrational Energy (zpe) 8398.6 cm-1
Scaled (by 0.9253) Zero Point Vibrational Energy (zpe) 7771.2 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 CISD/6-311G*
ABC
5.25267 0.31850 0.31850

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.522
Br2 0.000 0.000 0.421
H3 0.000 1.030 -1.862
H4 0.892 -0.515 -1.862
H5 -0.892 -0.515 -1.862

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94281.08471.08471.0847
Br21.94282.50392.50392.5039
H31.08472.50391.78451.7845
H41.08472.50391.78451.7845
H51.08472.50391.78451.7845

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 108.227 Br2 C1 H4 108.227
Br2 C1 H5 108.227 H3 C1 H4 110.686
H3 C1 H5 110.686 H4 C1 H5 110.686
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability