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All results from a given calculation for SiC (silicon monocarbide)

using model chemistry: PBEPBE/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 3Σ
2 1 yes C*V 1Σ

State 1 (3Σ)

Jump to S2C1
Energy calculated at PBEPBE/6-311G*
 hartrees
Energy at 0K-327.189123
Energy at 298.15K-327.187382
HF Energy-327.189123
Nuclear repulsion energy25.637274
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 PBEPBE/6-311G*
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 956 946 10.59      

Unscaled Zero Point Vibrational Energy (zpe) 478.0 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 473.0 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 PBEPBE/6-311G*
B
0.66774

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.520
C2 0.000 0.000 -1.214

Atom - Atom Distances (Å)
  Si1 C2
Si11.7338
C21.7338

picture of silicon monocarbide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.319      
2 C -0.319      


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 1.519 1.519
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.163 0.000 0.000
y 0.000 -20.527 0.000
z 0.000 0.000 -19.964
Traceless
 xyz
x 3.083 0.000 0.000
y 0.000 -1.963 0.000
z 0.000 0.000 -1.119
Polar
3z2-r2-2.239
x2-y23.364
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.376 0.000 0.000
y 0.000 5.324 0.000
z 0.000 0.000 8.061


<r2> (average value of r2) Å2
<r2> 24.629
(<r2>)1/2 4.963

State 2 (1Σ)

Jump to S1C1
Energy calculated at PBEPBE/6-311G*
 hartrees
Energy at 0K-327.154685
Energy at 298.15K-327.152964
HF Energy-327.154685
Nuclear repulsion energy26.861965
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 PBEPBE/6-311G*
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 1077 1066 3.27      

Unscaled Zero Point Vibrational Energy (zpe) 538.7 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 533.1 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 PBEPBE/6-311G*
B
0.73306

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.496
C2 0.000 0.000 -1.158

Atom - Atom Distances (Å)
  Si1 C2
Si11.6548
C21.6548

picture of silicon monocarbide state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.313      
2 C -0.313      


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 2.064 2.064
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.986 0.000 0.000
y 0.000 -19.986 0.000
z 0.000 0.000 -15.504
Traceless
 xyz
x -2.241 0.000 0.000
y 0.000 -2.241 0.000
z 0.000 0.000 4.482
Polar
3z2-r28.964
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 3.376 0.000 0.000
y 0.000 5.324 0.000
z 0.000 0.000 8.061


<r2> (average value of r2) Å2
<r2> 23.051
(<r2>)1/2 4.801