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

using model chemistry: LSDA/6-31+G**

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 LSDA/6-31+G**
 hartrees
Energy at 0K-326.236999
Energy at 298.15K-326.235261
HF Energy-326.236999
Nuclear repulsion energy25.785799
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 LSDA/6-31+G**
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 974 959 11.19      

Unscaled Zero Point Vibrational Energy (zpe) 486.9 cm-1
Scaled (by 0.985) Zero Point Vibrational Energy (zpe) 479.6 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 LSDA/6-31+G**
B
0.67550

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/6-31+G**

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.517
C2 0.000 0.000 -1.207

Atom - Atom Distances (Å)
  Si1 C2
Si11.7239
C21.7239

picture of silicon monocarbide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.293      
2 C -0.293      


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 1.721 1.721
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.321 0.000 0.000
y 0.000 -20.721 0.000
z 0.000 0.000 -20.318
Traceless
 xyz
x 3.198 0.000 0.000
y 0.000 -1.902 0.000
z 0.000 0.000 -1.297
Polar
3z2-r2-2.593
x2-y23.400
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.612 0.000 0.000
y 0.000 6.274 0.000
z 0.000 0.000 8.924


<r2> (average value of r2) Å2
<r2> 24.631
(<r2>)1/2 4.963

State 2 (1Σ)

Jump to S1C1
Energy calculated at LSDA/6-31+G**
 hartrees
Energy at 0K-326.209448
Energy at 298.15K-326.207732
HF Energy-326.209448
Nuclear repulsion energy27.040886
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 LSDA/6-31+G**
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 1102 1086 4.91      

Unscaled Zero Point Vibrational Energy (zpe) 551.0 cm-1
Scaled (by 0.985) Zero Point Vibrational Energy (zpe) 542.7 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 LSDA/6-31+G**
B
0.74286

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/6-31+G**

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 -1.151

Atom - Atom Distances (Å)
  Si1 C2
Si11.6438
C21.6438

picture of silicon monocarbide state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.310      
2 C -0.310      


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 2.221 2.221
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.072 0.000 0.000
y 0.000 -20.072 0.000
z 0.000 0.000 -15.673
Traceless
 xyz
x -2.199 0.000 0.000
y 0.000 -2.199 0.000
z 0.000 0.000 4.398
Polar
3z2-r28.796
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 3.612 0.000 0.000
y 0.000 6.274 0.000
z 0.000 0.000 8.924


<r2> (average value of r2) Å2
<r2> 22.970
(<r2>)1/2 4.793