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

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G**
 hartrees
Energy at 0K-2609.801237
Energy at 298.15K 
HF Energy-2609.505835
Nuclear repulsion energy89.087353
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**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3180 2972 15.15      
2 A1 1397 1306 27.13      
3 A1 635 593 11.14      
4 E 3310 3093 2.23      
4 E 3310 3093 2.23      
5 E 1542 1441 4.18      
5 E 1542 1441 4.18      
6 E 1004 938 4.87      
6 E 1004 938 4.87      

Unscaled Zero Point Vibrational Energy (zpe) 8462.2 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 7907.0 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 MP2=FULL/6-31G**
ABC
5.25774 0.31857 0.31857

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**

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 0.420
H3 0.000 1.030 -1.856
H4 0.892 -0.515 -1.856
H5 -0.892 -0.515 -1.856

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94431.08201.08201.0820
Br21.94432.49852.49852.4985
H31.08202.49851.78361.7836
H41.08202.49851.78361.7836
H51.08202.49851.78361.7836

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 107.871 Br2 C1 H4 107.871
Br2 C1 H5 107.871 H3 C1 H4 111.023
H3 C1 H5 111.023 H4 C1 H5 111.023
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability