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

using model chemistry: MP2=FULL/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2=FULL/STO-3G
 hartrees
Energy at 0K-2583.879138
Energy at 298.15K 
HF Energy-2583.812677
Nuclear repulsion energy89.185118
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 MP2=FULL/STO-3G
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 3364 2990 1.08      
2 A1 1567 1393 18.15      
3 A1 776 690 4.88      
4 E 3548 3154 0.86      
4 E 3548 3154 0.86      
5 E 1711 1521 2.82      
5 E 1711 1521 2.82      
6 E 1088 967 0.17      
6 E 1088 967 0.17      

Unscaled Zero Point Vibrational Energy (zpe) 9200.5 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 8178.3 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 MP2=FULL/STO-3G
ABC
5.18377 0.32063 0.32063

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.506
Br2 0.000 0.000 0.420
H3 0.000 1.037 -1.886
H4 0.898 -0.519 -1.886
H5 -0.898 -0.519 -1.886

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.92581.10471.10471.1047
Br21.92582.52872.52872.5287
H31.10472.52871.79631.7963
H41.10472.52871.79631.7963
H51.10472.52871.79631.7963

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 110.146 Br2 C1 H4 110.146
Br2 C1 H5 110.146 H3 C1 H4 108.789
H3 C1 H5 108.789 H4 C1 H5 108.788
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability