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

using model chemistry: MP4/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP4/6-311+G(3df,2p)
 hartrees
Energy at 0K-2612.390710
Energy at 298.15K 
HF Energy-2612.003463
Nuclear repulsion energy89.024456
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 MP4/6-311+G(3df,2p)
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 2912        
2 A1 1350 1274        
3 A1 628 592        
4 E 3195 3016        
4 E 3195 3016        
5 E 1494 1410        
5 E 1493 1409        
6 E 976 921        
6 E 976 921        

Unscaled Zero Point Vibrational Energy (zpe) 8195.7 cm-1
Scaled (by 0.9438) Zero Point Vibrational Energy (zpe) 7735.1 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 MP4/6-311+G(3df,2p)
ABC
5.22672 0.31835 0.31835

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-311+G(3df,2p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.524
Br2 0.000 0.000 0.421
H3 0.000 1.033 -1.859
H4 0.894 -0.516 -1.859
H5 -0.894 -0.516 -1.859

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94401.08601.08601.0860
Br21.94402.50262.50262.5026
H31.08602.50261.78891.7889
H41.08602.50261.78891.7889
H51.08602.50261.78891.7889

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 107.996 Br2 C1 H4 107.996
Br2 C1 H5 107.996 H3 C1 H4 110.905
H3 C1 H5 110.905 H4 C1 H5 110.905
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability