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

using model chemistry: MP2=FULL/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-2612.562868
Energy at 298.15K 
HF Energy-2612.092256
Nuclear repulsion energy90.007211
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/cc-pVTZ
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 3140 2981 15.77      
2 A1 1359 1290 18.01      
3 A1 657 624 8.24      
4 E 3239 3075 1.14      
4 E 3239 3075 1.14      
5 E 1504 1428 5.39      
5 E 1504 1428 5.39      
6 E 980 931 4.64      
6 E 980 931 4.64      

Unscaled Zero Point Vibrational Energy (zpe) 8300.2 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 7880.3 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 MP2=FULL/cc-pVTZ
ABC
5.30585 0.32580 0.32580

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.504
Br2 0.000 0.000 0.416
H3 0.000 1.025 -1.842
H4 0.888 -0.513 -1.842
H5 -0.888 -0.513 -1.842

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.92011.07921.07921.0792
Br21.92012.47942.47942.4794
H31.07922.47941.77551.7755
H41.07922.47941.77551.7755
H51.07922.47941.77551.7755

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 108.221 Br2 C1 H4 108.221
Br2 C1 H5 108.221 H3 C1 H4 110.692
H3 C1 H5 110.692 H4 C1 H5 110.692
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability