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

using model chemistry: PBEPBE/6-31G(2df,p)

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/6-31G(2df,p)
 hartrees
Energy at 0K-327.163500
Energy at 298.15K-327.161759
HF Energy-327.163500
Nuclear repulsion energy25.684535
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/6-31G(2df,p)
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 956 946 7.30      

Unscaled Zero Point Vibrational Energy (zpe) 478.1 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 473.2 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/6-31G(2df,p)
B
0.67020

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G(2df,p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.519
C2 0.000 0.000 -1.211

Atom - Atom Distances (Å)
  Si1 C2
Si11.7306
C21.7306

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/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.081      
2 C -0.081      


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 1.223 1.223
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.245 0.000 0.000
y 0.000 -17.132 0.000
z 0.000 0.000 -19.246
Traceless
 xyz
x -2.056 0.000 0.000
y 0.000 2.613 0.000
z 0.000 0.000 -0.558
Polar
3z2-r2-1.116
x2-y2-3.113
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.810 0.000 0.000
y 0.000 3.866 0.000
z 0.000 0.000 7.692


<r2> (average value of r2) Å2
<r2> 24.368
(<r2>)1/2 4.936

State 2 (1Σ)

Jump to S1C1
Energy calculated at PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-327.128055
Energy at 298.15K-327.126335
HF Energy-327.128055
Nuclear repulsion energy26.911673
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/6-31G(2df,p)
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 1074 1063 1.56      

Unscaled Zero Point Vibrational Energy (zpe) 536.8 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 531.3 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 PBEPBE/6-31G(2df,p)
B
0.73578

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G(2df,p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.496
C2 0.000 0.000 -1.156

Atom - Atom Distances (Å)
  Si1 C2
Si11.6517
C21.6517

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/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.075      
2 C -0.075      


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 1.764 1.764
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.716 0.000 0.000
y 0.000 -19.716 0.000
z 0.000 0.000 -15.043
Traceless
 xyz
x -2.336 0.000 0.000
y 0.000 -2.336 0.000
z 0.000 0.000 4.672
Polar
3z2-r29.345
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 5.810 0.000 0.000
y 0.000 3.866 0.000
z 0.000 0.000 7.692


<r2> (average value of r2) Å2
<r2> 22.800
(<r2>)1/2 4.775