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All results from a given calculation for CH4 (Methane)

using model chemistry: MP3/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes TD 1A1
Energy calculated at MP3/CEP-121G*
 hartrees
Energy at 0K-7.975770
Energy at 298.15K-7.978790
HF Energy-7.818618
Nuclear repulsion energy9.524557
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/CEP-121G*
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 3050 3050 0.00      
2 E 1580 1580 0.00      
2 E 1580 1580 0.00      
3 T2 3184 3184 31.91      
3 T2 3184 3184 31.91      
3 T2 3184 3184 31.91      
4 T2 1387 1387 16.80      
4 T2 1387 1387 16.80      
4 T2 1387 1387 16.80      

Unscaled Zero Point Vibrational Energy (zpe) 9961.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 9961.8 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 MP3/CEP-121G*
ABC
5.24970 5.24970 5.24970

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/CEP-121G*

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
H2 0.631 0.631 0.631
H3 -0.631 -0.631 0.631
H4 -0.631 0.631 -0.631
H5 0.631 -0.631 -0.631

Atom - Atom Distances (Å)
  C1 H2 H3 H4 H5
C11.09311.09311.09311.0931
H21.09311.78501.78501.7850
H31.09311.78501.78501.7850
H41.09311.78501.78501.7850
H51.09311.78501.78501.7850

picture of Methane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 109.471 H2 C1 H4 109.471
H2 C1 H5 109.471 H3 C1 H4 109.471
H3 C1 H5 109.471 H4 C1 H5 109.471
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability