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

using model chemistry: HF/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 HF/6-31G(2df,p)
 hartrees
Energy at 0K-326.614599
Energy at 298.15K-326.612827
HF Energy-326.614599
Nuclear repulsion energy25.277168
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 HF/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 832 754 25.27      

Unscaled Zero Point Vibrational Energy (zpe) 416.1 cm-1
Scaled (by 0.9055) Zero Point Vibrational Energy (zpe) 376.7 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 HF/6-31G(2df,p)
B
0.64911

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.528
C2 0.000 0.000 -1.231

Atom - Atom Distances (Å)
  Si1 C2
Si11.7585
C21.7585

picture of silicon monocarbide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.119      
2 C -0.119      


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 0.320 0.320
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.104 0.000 0.000
y 0.000 -16.856 0.000
z 0.000 0.000 -20.165
Traceless
 xyz
x -2.594 0.000 0.000
y 0.000 3.779 0.000
z 0.000 0.000 -1.185
Polar
3z2-r2-2.370
x2-y2-4.249
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.637 0.000 0.000
y 0.000 3.986 0.000
z 0.000 0.000 6.855


<r2> (average value of r2) Å2
<r2> 25.090
(<r2>)1/2 5.009

State 2 (1Σ)

Jump to S1C1
Energy calculated at HF/6-31G(2df,p)
 hartrees
Energy at 0K-326.503611
Energy at 298.15K-326.501900
HF Energy-326.503611
Nuclear repulsion energy27.431473
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 HF/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 1147 1039 54.82      

Unscaled Zero Point Vibrational Energy (zpe) 573.6 cm-1
Scaled (by 0.9055) Zero Point Vibrational Energy (zpe) 519.4 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 HF/6-31G(2df,p)
B
0.76447

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.486
C2 0.000 0.000 -1.134

Atom - Atom Distances (Å)
  Si1 C2
Si11.6204
C21.6204

picture of silicon monocarbide state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.188      
2 C -0.188      


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 1.433 1.433
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.834 0.000 0.000
y 0.000 -19.834 0.000
z 0.000 0.000 -15.247
Traceless
 xyz
x -2.294 0.000 0.000
y 0.000 -2.294 0.000
z 0.000 0.000 4.587
Polar
3z2-r29.175
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 -0.615 0.000 0.000
y 0.000 -0.615 0.000
z 0.000 0.000 7.607


<r2> (average value of r2) Å2
<r2> 22.461
(<r2>)1/2 4.739