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All results from a given calculation for CH (Methylidyne)

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 C*V 2Π1/2
3 1 yes C*V 4Σ-

State 1 (2Π1/2)

Jump to S2C1 S3C1
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-5.918124
Energy at 298.15K 
HF Energy-5.877853
Nuclear repulsion energy1.841987
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 Σ 2826 2731 305.03 198.05 0.62 0.77

Unscaled Zero Point Vibrational Energy (zpe) 1413.2 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 1365.6 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 MP2/CEP-31G
B
13.73047

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.164
H2 0.000 0.000 -0.985

Atom - Atom Distances (Å)
  C1 H2
C11.1491
H21.1491

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 MP2/CEP-31G
 hartrees
Energy at 0K-5.918124
Energy at 298.15K 
HF Energy-5.877853
Nuclear repulsion energy1.841987
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
Rotational Constants (cm-1) from geometry optimized at MP2/CEP-31G
B
13.73047

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

Point Group is C∞v

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 3 (4Σ-)

Jump to S1C1 S2C1
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-5.920725
Energy at 298.15K-5.919374
HF Energy-5.893784
Nuclear repulsion energy1.920416
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 Σ 3221 3113 1.51      

Unscaled Zero Point Vibrational Energy (zpe) 1610.7 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 1556.4 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
B
14.92462

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.157
H2 0.000 0.000 -0.945

Atom - Atom Distances (Å)
  C1 H2
C11.1022
H21.1022

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