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

using model chemistry: MP2=FULL/6-31G(2df,p)

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/6-31G(2df,p)
 hartrees
Energy at 0K-2610.100673
Energy at 298.15K-2610.106523
HF Energy-2609.686043
Nuclear repulsion energy90.749680
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/6-31G(2df,p)
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 3155 2965 12.05      
2 A1 1387 1304 13.80      
3 A1 688 647 7.46      
4 E 3269 3073 0.63      
4 E 3269 3073 0.63      
5 E 1526 1434 5.12      
5 E 1526 1434 5.12      
6 E 1007 947 5.06      
6 E 1007 947 5.06      

Unscaled Zero Point Vibrational Energy (zpe) 8417.0 cm-1
Scaled (by 0.9399) Zero Point Vibrational Energy (zpe) 7911.1 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 MP2=FULL/6-31G(2df,p)
ABC
5.31375 0.33213 0.33213

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G(2df,p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.475
Br2 0.000 0.000 0.407
H3 0.000 1.034 -1.800
H4 0.895 -0.517 -1.800
H5 -0.895 -0.517 -1.800

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.88241.08351.08351.0835
Br21.88242.43702.43702.4370
H31.08352.43701.79061.7906
H41.08352.43701.79061.7906
H51.08352.43701.79061.7906

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 107.426 Br2 C1 H4 107.426
Br2 C1 H5 107.426 H3 C1 H4 111.437
H3 C1 H5 111.437 H4 C1 H5 111.437
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability