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All results from a given calculation for CH3F (Methyl fluoride)

using model chemistry: MP2/CEP-31G*

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/CEP-31G*
 hartrees
Energy at 0K-31.375392
Energy at 298.15K-31.378411
HF Energy-31.088503
Nuclear repulsion energy22.626667
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/CEP-31G*
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 3105 2948 39.35 133.16 0.05 0.09
2 A1 1516 1439 5.37 5.15 0.62 0.76
3 A1 1068 1014 112.17 7.68 0.39 0.56
4 E 3223 3060 55.15 50.86 0.75 0.86
4 E 3223 3060 55.15 50.86 0.75 0.86
5 E 1522 1445 2.28 14.19 0.75 0.86
5 E 1522 1445 2.28 14.19 0.75 0.86
6 E 1205 1144 0.91 7.69 0.75 0.86
6 E 1205 1144 0.91 7.69 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8794.0 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 8349.0 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/CEP-31G*
ABC
5.09618 0.83430 0.83430

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.645
F2 0.000 0.000 0.761
H3 0.000 1.046 -0.991
H4 0.906 -0.523 -0.991
H5 -0.906 -0.523 -0.991

Atom - Atom Distances (Å)
  C1 F2 H3 H4 H5
C11.40581.10171.10171.1017
F21.40582.04032.04032.0403
H31.10172.04031.81171.8117
H41.10172.04031.81171.8117
H51.10172.04031.81171.8117

picture of Methyl fluoride state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 C1 H3 108.300 F2 C1 H4 108.300
F2 C1 H5 108.300 H3 C1 H4 110.616
H3 C1 H5 110.616 H4 C1 H5 110.616
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability