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

using model chemistry: AM1

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
Energy calculated at AM1
 hartrees
Energy at 0K 
Energy at 298.15K-0.009906
HF Energy-0.009906
Nuclear repulsion energy35.403437
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 AM1
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 3162 3015 4.00 146.74 0.04 0.08
2 A1 1317 1256 8.96 1.49 0.00 0.00
3 A1 667 636 19.35 35.51 0.39 0.56
4 E 3082 2939 13.99 109.52 0.75 0.86
4 E 3082 2939 13.99 109.52 0.75 0.86
5 E 1371 1308 8.06 40.19 0.75 0.86
5 E 1371 1308 8.06 40.19 0.75 0.86
6 E 889 847 0.67 18.90 0.75 0.86
6 E 889 847 0.67 18.90 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7915.1 cm-1
Scaled (by 0.9535) Zero Point Vibrational Energy (zpe) 7547.0 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 AM1
ABC
5.04895 0.32856 0.32856

See section I.F.4 to change rotational constant units
Geometric Data calculated at AM1

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.491
Br2 0.000 0.000 0.414
H3 0.000 1.051 -1.848
H4 0.910 -0.525 -1.848
H5 -0.910 -0.525 -1.848

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.90521.10991.10991.1099
Br21.90522.49452.49452.4945
H31.10992.49451.82011.8201
H41.10992.49451.82011.8201
H51.10992.49451.82011.8201

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 108.772 Br2 C1 H4 108.772
Br2 C1 H5 108.772 H3 C1 H4 110.161
H3 C1 H5 110.161 H4 C1 H5 110.161
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability