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

using model chemistry: MP3=FULL/TZVP

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=FULL/TZVP
 hartrees
Energy at 0K-2612.507671
Energy at 298.15K 
HF Energy-2612.040248
Nuclear repulsion energy88.970876
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=FULL/TZVP
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 2942 17.50      
2 A1 1395 1302 29.99      
3 A1 633 591 10.20      
4 E 3265 3049 3.71      
4 E 3265 3049 3.71      
5 E 1504 1404 4.54      
5 E 1504 1404 4.54      
6 E 993 927 4.31      
6 E 993 927 4.31      

Unscaled Zero Point Vibrational Energy (zpe) 8351.4 cm-1
Scaled (by 0.9337) Zero Point Vibrational Energy (zpe) 7797.7 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=FULL/TZVP
ABC
5.26820 0.31757 0.31757

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/TZVP

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 0.421
H3 0.000 1.029 -1.860
H4 0.891 -0.514 -1.860
H5 -0.891 -0.514 -1.860

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94711.08181.08181.0818
Br21.94712.50282.50282.5028
H31.08182.50281.78191.7819
H41.08182.50281.78191.7819
H51.08182.50281.78191.7819

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 108.011 Br2 C1 H4 108.011
Br2 C1 H5 108.011 H3 C1 H4 110.892
H3 C1 H5 110.892 H4 C1 H5 110.891
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability