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

using model chemistry: PBEPBE/6-31+G**

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 PBEPBE/6-31+G**
 hartrees
Energy at 0K-327.162383
Energy at 298.15K-327.160640
HF Energy-327.162383
Nuclear repulsion energy25.556007
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 PBEPBE/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Σ 946 935 12.70      

Unscaled Zero Point Vibrational Energy (zpe) 472.8 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 467.4 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 PBEPBE/6-31+G**
B
0.66351

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.522
C2 0.000 0.000 -1.218

Atom - Atom Distances (Å)
  Si1 C2
Si11.7394
C21.7394

picture of silicon monocarbide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.270      
2 C -0.270      


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 1.638 1.638
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.386 0.000 0.000
y 0.000 -20.849 0.000
z 0.000 0.000 -20.355
Traceless
 xyz
x 3.216 0.000 0.000
y 0.000 -1.979 0.000
z 0.000 0.000 -1.237
Polar
3z2-r2-2.474
x2-y23.463
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.680 0.000 0.000
y 0.000 6.938 0.000
z 0.000 0.000 9.105


<r2> (average value of r2) Å2
<r2> 24.905
(<r2>)1/2 4.990

State 2 (1Σ)

Jump to S1C1
Energy calculated at PBEPBE/6-31+G**
 hartrees
Energy at 0K-327.127286
Energy at 298.15K-327.125564
HF Energy-327.127286
Nuclear repulsion energy26.788079
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 PBEPBE/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Σ 1069 1057 4.71      

Unscaled Zero Point Vibrational Energy (zpe) 534.6 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 528.5 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 PBEPBE/6-31+G**
B
0.72903

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.498
C2 0.000 0.000 -1.162

Atom - Atom Distances (Å)
  Si1 C2
Si11.6594
C21.6594

picture of silicon monocarbide state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.297      
2 C -0.297      


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 2.190 2.190
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.225 0.000 0.000
y 0.000 -20.225 0.000
z 0.000 0.000 -15.677
Traceless
 xyz
x -2.274 0.000 0.000
y 0.000 -2.274 0.000
z 0.000 0.000 4.549
Polar
3z2-r29.097
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 3.680 0.000 0.000
y 0.000 6.938 0.000
z 0.000 0.000 9.105


<r2> (average value of r2) Å2
<r2> 23.250
(<r2>)1/2 4.822