return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH (Methylidyne)

using model chemistry: HF/daug-cc-pVTZ

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 HF/daug-cc-pVTZ
 hartrees
Energy at 0K-38.282322
Energy at 298.15K 
HF Energy-38.282322
Nuclear repulsion energy2.872113
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 HF/daug-cc-pVTZ
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 3032 2743 126.26 138.87 0.39 0.56

Unscaled Zero Point Vibrational Energy (zpe) 1515.9 cm-1
Scaled (by 0.9046) Zero Point Vibrational Energy (zpe) 1371.3 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 HF/daug-cc-pVTZ
B
14.83656

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/daug-cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.158
H2 0.000 0.000 -0.948

Atom - Atom Distances (Å)
  C1 H2
C11.1055
H21.1055

picture of Methylidyne state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.621      
2 H 0.621      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -1.606 1.606
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -7.736 0.000 0.000
y 0.000 -5.646 0.000
z 0.000 0.000 -7.752
Traceless
 xyz
x -1.038 0.000 0.000
y 0.000 2.099 0.000
z 0.000 0.000 -1.061
Polar
3z2-r2-2.122
x2-y2-2.091
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.133 0.000 0.000
y 0.000 1.753 0.000
z 0.000 0.000 2.230


<r2> (average value of r2) Å2
<r2> 5.448
(<r2>)1/2 2.334

State 2 (2Π3/2)

Jump to S1C1 S3C1
Energy calculated at HF/daug-cc-pVTZ
 hartrees
Energy at 0K-38.282322
Energy at 298.15K 
HF Energy-38.282322
Nuclear repulsion energy2.872113
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 HF/daug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at HF/daug-cc-pVTZ
B
14.83656

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/daug-cc-pVTZ

Point Group is C∞v

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 3 (4Σ-)

Jump to S1C1 S2C1
Energy calculated at HF/daug-cc-pVTZ
 hartrees
Energy at 0K-38.289634
Energy at 298.15K-38.288283
HF Energy-38.289634
Nuclear repulsion energy2.965132
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 HF/daug-cc-pVTZ
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 3348 3028 24.19      

Unscaled Zero Point Vibrational Energy (zpe) 1673.9 cm-1
Scaled (by 0.9046) Zero Point Vibrational Energy (zpe) 1514.2 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 HF/daug-cc-pVTZ
B
15.81314

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/daug-cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.153
H2 0.000 0.000 -0.918

Atom - Atom Distances (Å)
  C1 H2
C11.0708
H21.0708

picture of Methylidyne state 3 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.635      
2 H 0.635      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.548 0.548
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -7.266 0.000 0.000
y 0.000 -7.266 0.000
z 0.000 0.000 -5.469
Traceless
 xyz
x -0.899 0.000 0.000
y 0.000 -0.899 0.000
z 0.000 0.000 1.797
Polar
3z2-r23.594
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.681 0.000 0.000
y 0.000 1.681 0.000
z 0.000 0.000 1.778


<r2> (average value of r2) Å2
<r2> 5.147
(<r2>)1/2 2.269