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

using model chemistry: QCISD/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 QCISD/6-31G
 hartrees
Energy at 0K-2609.508268
Energy at 298.15K 
HF Energy-2609.354977
Nuclear repulsion energy86.087466
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/6-31G
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 3085 2973 15.78      
2 A1 1377 1327 23.15      
3 A1 541 521 11.77      
4 E 3203 3087 6.93      
4 E 3203 3087 6.93      
5 E 1519 1464 7.38      
5 E 1519 1464 7.38      
6 E 971 936 6.60      
6 E 971 936 6.60      

Unscaled Zero Point Vibrational Energy (zpe) 8195.5 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 7897.1 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/6-31G
ABC
5.10423 0.29560 0.29560

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.589
Br2 0.000 0.000 0.436
H3 0.000 1.045 -1.910
H4 0.905 -0.523 -1.910
H5 -0.905 -0.523 -1.910

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C12.02541.09341.09341.0934
Br22.02542.56872.56872.5687
H31.09342.56871.81031.8103
H41.09342.56871.81031.8103
H51.09342.56871.81031.8103

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 107.078 Br2 C1 H4 107.078
Br2 C1 H5 107.078 H3 C1 H4 111.754
H3 C1 H5 111.754 H4 C1 H5 111.754
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability