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

using model chemistry: CCD/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 CCD/cc-pVTZ
 hartrees
Energy at 0K-2612.522581
Energy at 298.15K 
HF Energy-2612.092282
Nuclear repulsion energy89.504031
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 CCD/cc-pVTZ
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 3112 2905 17.27      
2 A1 1364 1273 20.44      
3 A1 647 604 9.08      
4 E 3219 3006 2.44      
4 E 3219 3006 2.44      
5 E 1499 1400 4.94      
5 E 1499 1400 4.94      
6 E 983 918 4.01      
6 E 983 918 4.01      

Unscaled Zero Point Vibrational Energy (zpe) 8262.6 cm-1
Scaled (by 0.9337) Zero Point Vibrational Energy (zpe) 7714.8 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 CCD/cc-pVTZ
ABC
5.26443 0.32201 0.32201

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.514
Br2 0.000 0.000 0.418
H3 0.000 1.029 -1.852
H4 0.891 -0.515 -1.852
H5 -0.891 -0.515 -1.852

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.93171.08331.08331.0833
Br21.93172.49242.49242.4924
H31.08332.49241.78251.7825
H41.08332.49241.78251.7825
H51.08332.49241.78251.7825

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 108.193 Br2 C1 H4 108.193
Br2 C1 H5 108.193 H3 C1 H4 110.719
H3 C1 H5 110.719 H4 C1 H5 110.719
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability