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

using model chemistry: QCISD/6-311G**

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/6-311G**
 hartrees
Energy at 0K-2612.304130
Energy at 298.15K 
HF Energy-2611.994482
Nuclear repulsion energy88.879662
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/6-311G**
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 3103 2961 20.62      
2 A1 1379 1315 28.98      
3 A1 627 599 10.05      
4 E 3209 3062 5.61      
4 E 3209 3062 5.61      
5 E 1495 1427 4.53      
5 E 1495 1427 4.53      
6 E 986 941 5.34      
6 E 986 941 5.34      

Unscaled Zero Point Vibrational Energy (zpe) 8244.7 cm-1
Scaled (by 0.9541) Zero Point Vibrational Energy (zpe) 7866.3 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/6-311G**
ABC
5.21006 0.31739 0.31739

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.525
Br2 0.000 0.000 0.421
H3 0.000 1.034 -1.865
H4 0.896 -0.517 -1.865
H5 -0.896 -0.517 -1.865

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94591.08921.08921.0892
Br21.94592.50982.50982.5098
H31.08922.50981.79181.7918
H41.08922.50981.79181.7918
H51.08922.50981.79181.7918

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 108.234 Br2 C1 H4 108.234
Br2 C1 H5 108.234 H3 C1 H4 110.679
H3 C1 H5 110.679 H4 C1 H5 110.679
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability