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

using model chemistry: MP3=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 MP3=FULL/6-31G*
 hartrees
Energy at 0K-2609.796509
Energy at 298.15K-2609.802319
HF Energy-2609.500444
Nuclear repulsion energy88.676239
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=FULL/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 3164 2968 13.15      
2 A1 1399 1313 21.45      
3 A1 625 586 11.71      
4 E 3278 3076 2.28      
4 E 3278 3076 2.28      
5 E 1538 1444 5.73      
5 E 1538 1444 5.73      
6 E 1001 940 5.55      
6 E 1001 940 5.55      

Unscaled Zero Point Vibrational Energy (zpe) 8411.7 cm-1
Scaled (by 0.9383) Zero Point Vibrational Energy (zpe) 7892.7 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=FULL/6-31G*
ABC
5.20567 0.31562 0.31562

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.523
Br2 0.000 0.000 0.419
H3 0.000 1.039 -1.843
H4 0.900 -0.519 -1.843
H5 -0.900 -0.519 -1.843

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94171.08701.08701.0870
Br21.94172.48892.48892.4889
H31.08702.48891.79921.7992
H41.08702.48891.79921.7992
H51.08702.48891.79921.7992

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 107.127 Br2 C1 H4 107.127
Br2 C1 H5 107.127 H3 C1 H4 111.710
H3 C1 H5 111.710 H4 C1 H5 111.710
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability