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

using model chemistry: B2PLYP/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 B2PLYP/3-21G*
 hartrees
Energy at 0K-325.531832
Energy at 298.15K-325.530108
HF Energy-325.488288
Nuclear repulsion energy25.982975
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 B2PLYP/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 1051 1051 13.93      

Unscaled Zero Point Vibrational Energy (zpe) 525.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 525.5 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 B2PLYP/3-21G*
B
0.68587

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/3-21G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.513
C2 0.000 0.000 -1.198

Atom - Atom Distances (Å)
  Si1 C2
Si11.7108
C21.7108

picture of silicon monocarbide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.273      
2 C -0.273      


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 1.121 1.121
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.126 0.000 0.000
y 0.000 -20.340 0.000
z 0.000 0.000 -20.041
Traceless
 xyz
x 3.064 0.000 0.000
y 0.000 -1.756 0.000
z 0.000 0.000 -1.308
Polar
3z2-r2-2.616
x2-y23.214
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.246 0.000 0.000
y 0.000 4.896 0.000
z 0.000 0.000 7.033


<r2> (average value of r2) Å2
<r2> 24.265
(<r2>)1/2 4.926

State 2 (1Σ)

Jump to S1C1
Energy calculated at B2PLYP/3-21G*
 hartrees
Energy at 0K-325.502596
Energy at 298.15K-325.500873
HF Energy-325.424392
Nuclear repulsion energy26.734286
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 B2PLYP/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 1055 1055 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 527.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 527.5 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 B2PLYP/3-21G*
B
0.72611

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/3-21G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.499
C2 0.000 0.000 -1.164

Atom - Atom Distances (Å)
  Si1 C2
Si11.6627
C21.6627

picture of silicon monocarbide state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.203      
2 C -0.203      


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 1.777 1.777
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.012 0.000 0.000
y 0.000 -20.012 0.000
z 0.000 0.000 -15.650
Traceless
 xyz
x -2.181 0.000 0.000
y 0.000 -2.181 0.000
z 0.000 0.000 4.363
Polar
3z2-r28.725
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 -133.501 0.000 0.000
y 0.000 -133.501 0.000
z 0.000 0.000 7.237


<r2> (average value of r2) Å2
<r2> 23.202
(<r2>)1/2 4.817