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

using model chemistry: MP3/cc-pVTZ-PP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP3/cc-pVTZ-PP
 hartrees
Energy at 0K-455.567159
Energy at 298.15K 
HF Energy-455.137353
Nuclear repulsion energy66.746894
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 MP3/cc-pVTZ-PP
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 3131 3131 15.57      
2 A1 1359 1359 20.01      
3 A1 645 645 8.84      
4 E 3239 3239 2.05      
4 E 3239 3239 2.05      
5 E 1500 1500 4.95      
5 E 1500 1500 4.95      
6 E 980 980 4.13      
6 E 980 980 4.13      

Unscaled Zero Point Vibrational Energy (zpe) 8286.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8286.0 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 MP3/cc-pVTZ-PP
ABC
5.27101 0.32244 0.32244

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/cc-pVTZ-PP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.513
Br2 0.000 0.000 0.418
H3 0.000 1.028 -1.849
H4 0.891 -0.514 -1.849
H5 -0.891 -0.514 -1.849

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.93101.08181.08181.0818
Br21.93102.48902.48902.4890
H31.08182.48901.78141.7814
H41.08182.48901.78141.7814
H51.08182.48901.78141.7814

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 108.068 Br2 C1 H4 108.068
Br2 C1 H5 108.068 H3 C1 H4 110.837
H3 C1 H5 110.837 H4 C1 H5 110.837
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability