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

using model chemistry: B1B95/3-21G*

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 B1B95/3-21G*
 hartrees
Energy at 0K-325.715554
Energy at 298.15K-325.713819
HF Energy-325.715554
Nuclear repulsion energy25.833085
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 B1B95/3-21G*
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 989 944 9.88      

Unscaled Zero Point Vibrational Energy (zpe) 494.3 cm-1
Scaled (by 0.9549) Zero Point Vibrational Energy (zpe) 472.0 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 B1B95/3-21G*
B
0.67798

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G*

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 -1.204

Atom - Atom Distances (Å)
  Si1 C2
Si11.7207
C21.7207

picture of silicon monocarbide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.278      
2 C -0.278      


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 1.176 1.176
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.009 0.000 0.000
y 0.000 -20.310 0.000
z 0.000 0.000 -19.896
Traceless
 xyz
x 3.094 0.000 0.000
y 0.000 -1.858 0.000
z 0.000 0.000 -1.236
Polar
3z2-r2-2.473
x2-y23.301
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.258 0.000 0.000
y 0.000 4.523 0.000
z 0.000 0.000 7.044


<r2> (average value of r2) Å2
<r2> 24.347
(<r2>)1/2 4.934

State 2 (1Σ)

Jump to S1C1
Energy calculated at B1B95/3-21G*
 hartrees
Energy at 0K-325.674076
Energy at 298.15K-325.672362
HF Energy-325.674076
Nuclear repulsion energy27.088212
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 B1B95/3-21G*
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 1127 1076 5.10      

Unscaled Zero Point Vibrational Energy (zpe) 563.3 cm-1
Scaled (by 0.9549) Zero Point Vibrational Energy (zpe) 537.8 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 B1B95/3-21G*
B
0.74546

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.492
C2 0.000 0.000 -1.149

Atom - Atom Distances (Å)
  Si1 C2
Si11.6410
C21.6410

picture of silicon monocarbide state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.252      
2 C -0.252      


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 1.744 1.744
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.683 0.000 0.000
y 0.000 -19.683 0.000
z 0.000 0.000 -15.551
Traceless
 xyz
x -2.066 0.000 0.000
y 0.000 -2.066 0.000
z 0.000 0.000 4.131
Polar
3z2-r28.262
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 8.107 0.000 0.000
y 0.000 8.107 0.000
z 0.000 0.000 7.181


<r2> (average value of r2) Å2
<r2> 22.743
(<r2>)1/2 4.769