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

using model chemistry: CCD/6-31G*

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/6-31G*
 hartrees
Energy at 0K-2609.768908
Energy at 298.15K-2609.774715
HF Energy-2609.500302
Nuclear repulsion energy88.517777
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/6-31G*
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 3134 2967 14.90      
2 A1 1392 1317 22.00      
3 A1 622 589 11.24      
4 E 3249 3075 3.00      
4 E 3249 3075 3.00      
5 E 1530 1448 5.35      
5 E 1530 1448 5.35      
6 E 997 943 5.30      
6 E 997 943 5.30      

Unscaled Zero Point Vibrational Energy (zpe) 8349.7 cm-1
Scaled (by 0.9465) Zero Point Vibrational Energy (zpe) 7903.0 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/6-31G*
ABC
5.18405 0.31454 0.31454

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.526
Br2 0.000 0.000 0.420
H3 0.000 1.041 -1.848
H4 0.901 -0.520 -1.848
H5 -0.901 -0.520 -1.848

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94611.08951.08951.0895
Br21.94612.49552.49552.4955
H31.08952.49551.80281.8028
H41.08952.49551.80281.8028
H51.08952.49551.80281.8028

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 107.192 Br2 C1 H4 107.192
Br2 C1 H5 107.192 H3 C1 H4 111.651
H3 C1 H5 111.651 H4 C1 H5 111.651
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability