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

using model chemistry: CID/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 CID/3-21G
 hartrees
Energy at 0K-2599.591730
Energy at 298.15K 
HF Energy-2599.448742
Nuclear repulsion energy86.646443
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 CID/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 3137 2923 12.81      
2 A1 1420 1323 19.19      
3 A1 597 556 9.10      
4 E 3236 3014 5.83      
4 E 3236 3014 5.83      
5 E 1566 1459 8.55      
5 E 1566 1459 8.55      
6 E 990 922 7.18      
6 E 990 922 7.18      

Unscaled Zero Point Vibrational Energy (zpe) 8368.1 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 7795.7 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 CID/3-21G
ABC
5.19127 0.29948 0.29948

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.576
Br2 0.000 0.000 0.434
H3 0.000 1.036 -1.907
H4 0.898 -0.518 -1.907
H5 -0.898 -0.518 -1.907

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C12.00951.08801.08801.0880
Br22.00952.55982.55982.5598
H31.08802.55981.79501.7950
H41.08802.55981.79501.7950
H51.08802.55981.79501.7950

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 107.722 Br2 C1 H4 107.722
Br2 C1 H5 107.722 H3 C1 H4 111.163
H3 C1 H5 111.163 H4 C1 H5 111.163
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability