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

using model chemistry: TPSSh/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 TPSSh/3-21G
 hartrees
Energy at 0K-325.652500
Energy at 298.15K-325.650747
HF Energy-325.652500
Nuclear repulsion energy24.980042
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 TPSSh/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 902 874 6.53      

Unscaled Zero Point Vibrational Energy (zpe) 451.2 cm-1
Scaled (by 0.9688) Zero Point Vibrational Energy (zpe) 437.1 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 TPSSh/3-21G
B
0.63394

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.534
C2 0.000 0.000 -1.246

Atom - Atom Distances (Å)
  Si1 C2
Si11.7795
C21.7795

picture of silicon monocarbide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.439      
2 C -0.439      


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 0.143 0.143
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.170 0.000 0.000
y 0.000 3.320 0.000
z 0.000 0.000 7.529


<r2> (average value of r2) Å2
<r2> 25.531
(<r2>)1/2 5.053

State 2 (1Σ)

Jump to S1C1
Energy calculated at TPSSh/3-21G
 hartrees
Energy at 0K-325.609185
Energy at 298.15K-325.607457
HF Energy-325.609185
Nuclear repulsion energy26.266085
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 TPSSh/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 1028 996 1.31      

Unscaled Zero Point Vibrational Energy (zpe) 514.0 cm-1
Scaled (by 0.9688) Zero Point Vibrational Energy (zpe) 498.0 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 TPSSh/3-21G
B
0.70090

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.508
C2 0.000 0.000 -1.185

Atom - Atom Distances (Å)
  Si1 C2
Si11.6923
C21.6923

picture of silicon monocarbide state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.436      
2 C -0.436      


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 1.662 1.662
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.938 0.000 0.000
y 0.000 9.938 0.000
z 0.000 0.000 7.386


<r2> (average value of r2) Å2
<r2> 23.752
(<r2>)1/2 4.874