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

using model chemistry: PBE1PBE/3-21G*

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 PBE1PBE/3-21G*
 hartrees
Energy at 0K-325.531749
Energy at 298.15K-325.530015
HF Energy-325.531749
Nuclear repulsion energy25.827740
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 PBE1PBE/3-21G*
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 990 950 10.58      

Unscaled Zero Point Vibrational Energy (zpe) 494.8 cm-1
Scaled (by 0.9598) Zero Point Vibrational Energy (zpe) 474.9 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 PBE1PBE/3-21G*
B
0.67770

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G*

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
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.290      
2 C -0.290      


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 1.070 1.070
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.410 0.000 0.000
y 0.000 -17.069 0.000
z 0.000 0.000 -20.024
Traceless
 xyz
x -1.864 0.000 0.000
y 0.000 3.148 0.000
z 0.000 0.000 -1.284
Polar
3z2-r2-2.568
x2-y2-3.342
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.726 0.000 0.000
y 0.000 3.326 0.000
z 0.000 0.000 7.166


<r2> (average value of r2) Å2
<r2> 24.412
(<r2>)1/2 4.941

State 2 (1Σ)

Jump to S1C1
Energy calculated at PBE1PBE/3-21G*
 hartrees
Energy at 0K-325.485377
Energy at 298.15K-325.483663
HF Energy-325.485377
Nuclear repulsion energy27.046820
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 PBE1PBE/3-21G*
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 1123 1078 5.44      

Unscaled Zero Point Vibrational Energy (zpe) 561.3 cm-1
Scaled (by 0.9598) Zero Point Vibrational Energy (zpe) 538.8 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 PBE1PBE/3-21G*
B
0.74318

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G*

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
Si11.6435
C21.6435

picture of silicon monocarbide state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.261      
2 C -0.261      


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 1.763 1.763
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.807 0.000 0.000
y 0.000 -19.807 0.000
z 0.000 0.000 -15.623
Traceless
 xyz
x -2.092 0.000 0.000
y 0.000 -2.092 0.000
z 0.000 0.000 4.184
Polar
3z2-r28.368
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 9.414 0.000 0.000
y 0.000 9.414 0.000
z 0.000 0.000 7.285


<r2> (average value of r2) Å2
<r2> 22.844
(<r2>)1/2 4.780