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All results from a given calculation for CH (Methylidyne)

using model chemistry: MP2/STO-3G

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/STO-3G
 hartrees
Energy at 0K-37.793689
Energy at 298.15K 
HF Energy-37.770015
Nuclear repulsion energy2.731694
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/STO-3G
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 3114 2715 139.87 41.97 0.50 0.66

Unscaled Zero Point Vibrational Energy (zpe) 1557.1 cm-1
Scaled (by 0.8719) Zero Point Vibrational Energy (zpe) 1357.6 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/STO-3G
B
13.42129

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/STO-3G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.166
H2 0.000 0.000 -0.996

Atom - Atom Distances (Å)
  C1 H2
C11.1623
H21.1623

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/STO-3G
 hartrees
Energy at 0K-37.793689
Energy at 298.15K 
HF Energy-37.770015
Nuclear repulsion energy2.731694
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/STO-3G
Rotational Constants (cm-1) from geometry optimized at MP2/STO-3G
B
13.42129

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/STO-3G

Point Group is C∞v

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 3 (4Σ-)

Jump to S1C1 S2C1
Energy calculated at MP2/STO-3G
 hartrees
Energy at 0K-37.803295
Energy at 298.15K-37.801943
HF Energy-37.791894
Nuclear repulsion energy2.917150
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/STO-3G
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 3577 3119 4.52      

Unscaled Zero Point Vibrational Energy (zpe) 1788.6 cm-1
Scaled (by 0.8719) Zero Point Vibrational Energy (zpe) 1559.4 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/STO-3G
B
15.30550

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/STO-3G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.155
H2 0.000 0.000 -0.933

Atom - Atom Distances (Å)
  C1 H2
C11.0884
H21.0884

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