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

using model chemistry: B3LYP/SDD

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/SDD
 hartrees
Energy at 0K-327.361147
Energy at 298.15K-327.359393
HF Energy-327.361147
Nuclear repulsion energy25.143326
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/SDD
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 902 867 14.81      

Unscaled Zero Point Vibrational Energy (zpe) 451.1 cm-1
Scaled (by 0.9613) Zero Point Vibrational Energy (zpe) 433.7 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/SDD
B
0.64226

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/SDD

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.530
C2 0.000 0.000 -1.238

Atom - Atom Distances (Å)
  Si1 C2
Si11.7679
C21.7679

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/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.455      
2 C -0.455      


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 1.652 1.652
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.190 0.000 0.000
y 0.000 -20.706 0.000
z 0.000 0.000 -21.022
Traceless
 xyz
x 3.674 0.000 0.000
y 0.000 -1.600 0.000
z 0.000 0.000 -2.074
Polar
3z2-r2-4.148
x2-y23.516
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.169 0.000 0.000
y 0.000 5.522 0.000
z 0.000 0.000 8.307


<r2> (average value of r2) Å2
<r2> 25.393
(<r2>)1/2 5.039

State 2 (1Σ)

Jump to S1C1
Energy calculated at B3LYP/SDD
 hartrees
Energy at 0K-327.318699
Energy at 298.15K-327.316970
HF Energy-327.318699
Nuclear repulsion energy26.411000
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/SDD
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 1024 984 7.82      

Unscaled Zero Point Vibrational Energy (zpe) 511.8 cm-1
Scaled (by 0.9613) Zero Point Vibrational Energy (zpe) 492.0 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/SDD
B
0.70865

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/SDD

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.505
C2 0.000 0.000 -1.178

Atom - Atom Distances (Å)
  Si1 C2
Si11.6830
C21.6830

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/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.464      
2 C -0.464      


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 2.103 2.103
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.062 0.000 0.000
y 0.000 -20.062 0.000
z 0.000 0.000 -16.289
Traceless
 xyz
x -1.886 0.000 0.000
y 0.000 -1.886 0.000
z 0.000 0.000 3.773
Polar
3z2-r27.545
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 16.754 0.000 0.000
y 0.000 16.754 0.000
z 0.000 0.000 8.101


<r2> (average value of r2) Å2
<r2> 23.642
(<r2>)1/2 4.862