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All results from a given calculation for CH (Methylidyne)

using model chemistry: MP4/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 2Π1/2
3 1 yes C*V 4Σ-

State 1 (2Π1/2)

Jump to S2C1 S3C1
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-38.360445
Energy at 298.15K 
HF Energy-38.264631
Nuclear repulsion energy2.806353
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 MP4/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 2831 2703        

Unscaled Zero Point Vibrational Energy (zpe) 1415.6 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 1351.6 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 MP4/6-31G*
B
14.17945

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.162
H2 0.000 0.000 -0.969

Atom - Atom Distances (Å)
  C1 H2
C11.1308
H21.1308

picture of Methylidyne state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (2Π3/2)

Jump to S1C1 S3C1
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-38.360445
Energy at 298.15K 
HF Energy-38.264631
Nuclear repulsion energy2.806353
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 MP4/6-31G*
Rotational Constants (cm-1) from geometry optimized at MP4/6-31G*
B
14.17945

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is C∞v

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 3 (4Σ-)

Jump to S1C1 S2C1
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-38.344805
Energy at 298.15K-38.343453
HF Energy-38.275919
Nuclear repulsion energy2.914850
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 MP4/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 3203 3058        

Unscaled Zero Point Vibrational Energy (zpe) 1601.4 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 1529.0 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 MP4/6-31G*
B
15.29652

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.156
H2 0.000 0.000 -0.933

Atom - Atom Distances (Å)
  C1 H2
C11.0887
H21.0887

picture of Methylidyne state 3 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability