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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-325.450102
Energy at 298.15K-325.448357
HF Energy-325.414414
Nuclear repulsion energy25.243964
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 937 937 2.51      

Unscaled Zero Point Vibrational Energy (zpe) 468.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 468.6 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 B2PLYP/3-21G
B
0.64741

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 0.528
C2 0.000 0.000 -1.233

Atom - Atom Distances (Å)
  Si1 C2
Si11.7609
C21.7609

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 0.439      
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 1.149 1.149
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.748 0.000 0.000
y 0.000 -17.343 0.000
z 0.000 0.000 -20.798
Traceless
 xyz
x -1.677 0.000 0.000
y 0.000 3.430 0.000
z 0.000 0.000 -1.753
Polar
3z2-r2-3.505
x2-y2-3.405
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.088 0.000 0.000
y 0.000 3.218 0.000
z 0.000 0.000 7.565


<r2> (average value of r2) Å2
<r2> 25.283
(<r2>)1/2 5.028

State 2 (1Σ)

Jump to S1C1
Energy calculated at B2PLYP/3-21G
 hartrees
Energy at 0K-325.426012
Energy at 298.15K-325.424278
HF Energy-325.349540
Nuclear repulsion energy26.034471
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 987 987 1.37      

Unscaled Zero Point Vibrational Energy (zpe) 493.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 493.5 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
0.68859

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 0.512
C2 0.000 0.000 -1.195

Atom - Atom Distances (Å)
  Si1 C2
Si11.7074
C21.7074

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 0.366      
2 C -0.366      


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 1.798 1.798
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.303 0.000 0.000
y 0.000 -20.303 0.000
z 0.000 0.000 -16.178
Traceless
 xyz
x -2.062 0.000 0.000
y 0.000 -2.062 0.000
z 0.000 0.000 4.125
Polar
3z2-r28.249
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 -99.310 0.000 0.000
y 0.000 -99.310 0.000
z 0.000 0.000 7.287


<r2> (average value of r2) Å2
<r2> 24.066
(<r2>)1/2 4.906