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

using model chemistry: B3PW91/6-31G**

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 B3PW91/6-31G**
 hartrees
Energy at 0K-327.301208
Energy at 298.15K-327.299471
HF Energy-327.301208
Nuclear repulsion energy25.827154
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 B3PW91/6-31G**
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 979 939 12.06      

Unscaled Zero Point Vibrational Energy (zpe) 489.7 cm-1
Scaled (by 0.9584) Zero Point Vibrational Energy (zpe) 469.3 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 B3PW91/6-31G**
B
0.67767

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G**

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.516
C2 0.000 0.000 -1.205

Atom - Atom Distances (Å)
  Si1 C2
Si11.7211
C21.7211

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 B3PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.212      
2 C -0.212      


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 1.127 1.127
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.189 0.000 0.000
y 0.000 -16.845 0.000
z 0.000 0.000 -19.731
Traceless
 xyz
x -1.901 0.000 0.000
y 0.000 3.115 0.000
z 0.000 0.000 -1.214
Polar
3z2-r2-2.428
x2-y2-3.344
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.558 0.000 0.000
y 0.000 3.382 0.000
z 0.000 0.000 7.585


<r2> (average value of r2) Å2
<r2> 24.259
(<r2>)1/2 4.925

State 2 (1Σ)

Jump to S1C1
Energy calculated at B3PW91/6-31G**
 hartrees
Energy at 0K-327.256294
Energy at 298.15K-327.254576
HF Energy-327.256294
Nuclear repulsion energy27.019347
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 B3PW91/6-31G**
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 1099 1054 5.51      

Unscaled Zero Point Vibrational Energy (zpe) 549.6 cm-1
Scaled (by 0.9584) Zero Point Vibrational Energy (zpe) 526.7 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 B3PW91/6-31G**
B
0.74167

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G**

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.494
C2 0.000 0.000 -1.152

Atom - Atom Distances (Å)
  Si1 C2
Si11.6452
C21.6452

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 B3PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.183      
2 C -0.183      


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 1.770 1.770
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.584 0.000 0.000
y 0.000 -19.584 0.000
z 0.000 0.000 -15.323
Traceless
 xyz
x -2.130 0.000 0.000
y 0.000 -2.130 0.000
z 0.000 0.000 4.261
Polar
3z2-r28.522
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 11.760 0.000 0.000
y 0.000 11.760 0.000
z 0.000 0.000 7.472


<r2> (average value of r2) Å2
<r2> 22.712
(<r2>)1/2 4.766