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

using model chemistry: B3LYP/6-31G

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/6-31G
 hartrees
Energy at 0K-327.346708
Energy at 298.15K-327.344950
HF Energy-327.346708
Nuclear repulsion energy25.054347
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/6-31G
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 885 852 9.98      

Unscaled Zero Point Vibrational Energy (zpe) 442.6 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 425.8 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/6-31G
B
0.63772

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.532
C2 0.000 0.000 -1.242

Atom - Atom Distances (Å)
  Si1 C2
Si11.7742
C21.7742

picture of silicon monocarbide state 1 conformation 1
More geometry information
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.312      
2 C -0.312      


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 1.164 1.164
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.054 0.000 0.000
y 0.000 -20.545 0.000
z 0.000 0.000 -20.525
Traceless
 xyz
x 3.481 0.000 0.000
y 0.000 -1.756 0.000
z 0.000 0.000 -1.725
Polar
3z2-r2-3.450
x2-y23.491
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.255 0.000 0.000
y 0.000 5.880 0.000
z 0.000 0.000 7.687


<r2> (average value of r2) Å2
<r2> 25.322
(<r2>)1/2 5.032

State 2 (1Σ)

Jump to S1C1
Energy calculated at B3LYP/6-31G
 hartrees
Energy at 0K-327.304331
Energy at 298.15K-327.302599
HF Energy-327.304331
Nuclear repulsion energy26.337878
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/6-31G
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 1008 970 3.96      

Unscaled Zero Point Vibrational Energy (zpe) 504.2 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 485.0 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/6-31G
B
0.70473

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.506
C2 0.000 0.000 -1.181

Atom - Atom Distances (Å)
  Si1 C2
Si11.6877
C21.6877

picture of silicon monocarbide state 2 conformation 1
More geometry information
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.288      
2 C -0.288      


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 1.698 1.698
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.851 0.000 0.000
y 0.000 -19.851 0.000
z 0.000 0.000 -15.979
Traceless
 xyz
x -1.936 0.000 0.000
y 0.000 -1.936 0.000
z 0.000 0.000 3.871
Polar
3z2-r27.743
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 16.143 0.000 0.000
y 0.000 16.143 0.000
z 0.000 0.000 7.497


<r2> (average value of r2) Å2
<r2> 23.556
(<r2>)1/2 4.853