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All results from a given calculation for CH (Methylidyne)

using model chemistry: CID/3-21G

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 CID/3-21G
 hartrees
Energy at 0K-38.114010
Energy at 298.15K 
HF Energy-38.051591
Nuclear repulsion energy2.774483
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 CID/3-21G
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 2635 2455 197.21      

Unscaled Zero Point Vibrational Energy (zpe) 1317.7 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 1227.5 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 CID/3-21G
B
13.84503

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.163
H2 0.000 0.000 -0.981

Atom - Atom Distances (Å)
  C1 H2
C11.1444
H21.1444

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 CID/3-21G
 hartrees
Energy at 0K-38.114010
Energy at 298.15K 
HF Energy-38.051591
Nuclear repulsion energy2.774483
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 CID/3-21G
Rotational Constants (cm-1) from geometry optimized at CID/3-21G
B
13.84503

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G

Point Group is C∞v

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 3 (4Σ-)

Jump to S1C1 S2C1
Energy calculated at CID/3-21G
 hartrees
Energy at 0K-38.112130
Energy at 298.15K-38.110779
HF Energy-38.070362
Nuclear repulsion energy2.910540
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 CID/3-21G
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 3143 2928 11.90      

Unscaled Zero Point Vibrational Energy (zpe) 1571.5 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 1464.0 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 CID/3-21G
B
15.23622

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G

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 -0.935

Atom - Atom Distances (Å)
  C1 H2
C11.0909
H21.0909

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