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

using model chemistry: B3LYP/CEP-31G

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 B3LYP/CEP-31G
 hartrees
Energy at 0K-9.282630
Energy at 298.15K-9.280866
HF Energy-9.282630
Nuclear repulsion energy4.740386
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 B3LYP/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 864 837 15.02      

Unscaled Zero Point Vibrational Energy (zpe) 432.1 cm-1
Scaled (by 0.9684) Zero Point Vibrational Energy (zpe) 418.4 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 B3LYP/CEP-31G
B
0.62923

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.536
C2 0.000 0.000 -1.250

Atom - Atom Distances (Å)
  Si1 C2
Si11.7861
C21.7861

picture of silicon monocarbide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.263      
2 C -0.263      


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 1.478 1.478
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.819 0.000 0.000
y 0.000 -16.158 0.000
z 0.000 0.000 -20.038
Traceless
 xyz
x -1.721 0.000 0.000
y 0.000 3.770 0.000
z 0.000 0.000 -2.049
Polar
3z2-r2-4.099
x2-y2-3.661
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.219 0.000 0.000
y 0.000 3.330 0.000
z 0.000 0.000 8.375


<r2> (average value of r2) Å2
<r2> 19.063
(<r2>)1/2 4.366

State 2 (1Σ)

Jump to S1C1
Energy calculated at B3LYP/CEP-31G
 hartrees
Energy at 0K-9.237818
Energy at 298.15K-9.236082
HF Energy-9.237818
Nuclear repulsion energy4.981638
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 B3LYP/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 985 954 7.78      

Unscaled Zero Point Vibrational Energy (zpe) 492.6 cm-1
Scaled (by 0.9684) Zero Point Vibrational Energy (zpe) 477.0 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 B3LYP/CEP-31G
B
0.69491

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.510
C2 0.000 0.000 -1.190

Atom - Atom Distances (Å)
  Si1 C2
Si11.6996
C21.6996

picture of silicon monocarbide state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.253      
2 C -0.253      


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 2.036 2.036
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.061 0.000 0.000
y 0.000 -19.061 0.000
z 0.000 0.000 -15.181
Traceless
 xyz
x -1.940 0.000 0.000
y 0.000 -1.940 0.000
z 0.000 0.000 3.880
Polar
3z2-r27.760
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 28.839 0.000 0.000
y 0.000 28.839 0.000
z 0.000 0.000 8.249


<r2> (average value of r2) Å2
<r2> 17.799
(<r2>)1/2 4.219