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

using model chemistry: MP4=FULL/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP4=FULL/cc-pVDZ
 hartrees
Energy at 0K-2612.323172
Energy at 298.15K 
HF Energy-2612.000165
Nuclear repulsion energy88.637574
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 MP4=FULL/cc-pVDZ
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 3096 2988        
2 A1 1337 1290        
3 A1 626 604        
4 E 3217 3105        
4 E 3217 3105        
5 E 1473 1422        
5 E 1473 1421        
6 E 966 932        
6 E 966 932        

Unscaled Zero Point Vibrational Energy (zpe) 8185.0 cm-1
Scaled (by 0.9651) Zero Point Vibrational Energy (zpe) 7899.3 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 MP4=FULL/cc-pVDZ
ABC
5.11184 0.31625 0.31625

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.526
Br2 0.000 0.000 0.422
H3 0.000 1.044 -1.871
H4 0.904 -0.522 -1.871
H5 -0.904 -0.522 -1.871

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94821.09971.09971.0997
Br21.94822.51922.51922.5192
H31.09972.51921.80891.8089
H41.09972.51921.80891.8089
H51.09972.51921.80891.8089

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 108.251 Br2 C1 H4 108.251
Br2 C1 H5 108.251 H3 C1 H4 110.663
H3 C1 H5 110.663 H4 C1 H5 110.663
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability