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

using model chemistry: B3PW91/6-311G**

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 B3PW91/6-311G**
 hartrees
Energy at 0K-327.331398
Energy at 298.15K-327.329664
HF Energy-327.331398
Nuclear repulsion energy25.888539
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 B3PW91/6-311G**
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 988 952 15.73      

Unscaled Zero Point Vibrational Energy (zpe) 494.2 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 476.0 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 B3PW91/6-311G**
B
0.68089

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G**

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.515
C2 0.000 0.000 -1.202

Atom - Atom Distances (Å)
  Si1 C2
Si11.7170
C21.7170

picture of silicon monocarbide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.355      
2 C -0.355      


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 1.474 1.474
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.006 0.000 0.000
y 0.000 -20.408 0.000
z 0.000 0.000 -19.976
Traceless
 xyz
x 3.185 0.000 0.000
y 0.000 -1.917 0.000
z 0.000 0.000 -1.268
Polar
3z2-r2-2.537
x2-y23.402
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.394 0.000 0.000
y 0.000 5.518 0.000
z 0.000 0.000 7.978


<r2> (average value of r2) Å2
<r2> 24.330
(<r2>)1/2 4.933

State 2 (1Σ)

Jump to S1C1
Energy calculated at B3PW91/6-311G**
 hartrees
Energy at 0K-327.286332
Energy at 298.15K-327.284616
HF Energy-327.286332
Nuclear repulsion energy27.062326
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 B3PW91/6-311G**
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 1102 1061 7.41      

Unscaled Zero Point Vibrational Energy (zpe) 551.0 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 530.7 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 B3PW91/6-311G**
B
0.74404

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G**

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.493
C2 0.000 0.000 -1.150

Atom - Atom Distances (Å)
  Si1 C2
Si11.6425
C21.6425

picture of silicon monocarbide state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.357      
2 C -0.357      


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 2.089 2.089
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.843 0.000 0.000
y 0.000 -19.843 0.000
z 0.000 0.000 -15.453
Traceless
 xyz
x -2.195 0.000 0.000
y 0.000 -2.195 0.000
z 0.000 0.000 4.391
Polar
3z2-r28.781
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 14.322 0.000 0.000
y 0.000 14.322 0.000
z 0.000 0.000 7.821


<r2> (average value of r2) Å2
<r2> 22.811
(<r2>)1/2 4.776