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

using model chemistry: MP3/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 MP3/cc-pVDZ
 hartrees
Energy at 0K-2612.303033
Energy at 298.15K 
HF Energy-2612.000303
Nuclear repulsion energy88.795642
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 MP3/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 3132 2969 17.57      
2 A1 1351 1281 24.34      
3 A1 639 605 9.27      
4 E 3250 3080 3.13      
4 E 3250 3080 3.13      
5 E 1483 1405 4.85      
5 E 1483 1405 4.85      
6 E 977 926 4.83      
6 E 977 926 4.83      

Unscaled Zero Point Vibrational Energy (zpe) 8269.6 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 7838.7 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 MP3/cc-pVDZ
ABC
5.13135 0.31736 0.31736

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.524
Br2 0.000 0.000 0.421
H3 0.000 1.042 -1.867
H4 0.903 -0.521 -1.867
H5 -0.903 -0.521 -1.867

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94491.09741.09741.0974
Br21.94492.51432.51432.5143
H31.09742.51431.80551.8055
H41.09742.51431.80551.8055
H51.09742.51431.80551.8055

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 108.219 Br2 C1 H4 108.219
Br2 C1 H5 108.219 H3 C1 H4 110.694
H3 C1 H5 110.694 H4 C1 H5 110.694
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability