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

using model chemistry: QCISD/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at QCISD/6-31+G**
 hartrees
Energy at 0K-2609.810955
Energy at 298.15K 
HF Energy-2609.519612
Nuclear repulsion energy88.583825
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 QCISD/6-31+G**
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 3151 2979 19.39      
2 A1 1394 1318 33.08      
3 A1 613 579 12.26      
4 E 3269 3091 3.15      
4 E 3269 3091 3.15      
5 E 1522 1439 4.29      
5 E 1522 1439 4.29      
6 E 1002 947 3.81      
6 E 1002 947 3.81      

Unscaled Zero Point Vibrational Energy (zpe) 8371.7 cm-1
Scaled (by 0.9454) Zero Point Vibrational Energy (zpe) 7914.6 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 QCISD/6-31+G**
ABC
5.22720 0.31470 0.31470

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.534
Br2 0.000 0.000 0.423
H3 0.000 1.033 -1.865
H4 0.894 -0.516 -1.865
H5 -0.894 -0.516 -1.865

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.95711.08451.08451.0845
Br21.95712.51042.51042.5104
H31.08452.51041.78881.7888
H41.08452.51041.78881.7888
H51.08452.51041.78881.7888

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 107.771 Br2 C1 H4 107.771
Br2 C1 H5 107.771 H3 C1 H4 111.117
H3 C1 H5 111.117 H4 C1 H5 111.117
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability