return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: B3LYP/6-311G**

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 B3LYP/6-311G**
 hartrees
Energy at 0K-327.404635
Energy at 298.15K-327.402900
HF Energy-327.404635
Nuclear repulsion energy25.852704
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 B3LYP/6-311G**
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 981 948 14.81      

Unscaled Zero Point Vibrational Energy (zpe) 490.3 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 474.0 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 B3LYP/6-311G**
B
0.67901

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-311G**

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
Si11.7194
C21.7194

picture of silicon monocarbide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.350      
2 C -0.350      


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 1.588 1.588
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.097 0.000 0.000
y 0.000 -20.526 0.000
z 0.000 0.000 -20.121
Traceless
 xyz
x 3.227 0.000 0.000
y 0.000 -1.917 0.000
z 0.000 0.000 -1.310
Polar
3z2-r2-2.619
x2-y23.429
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.354 0.000 0.000
y 0.000 5.825 0.000
z 0.000 0.000 7.878


<r2> (average value of r2) Å2
<r2> 24.439
(<r2>)1/2 4.944

State 2 (1Σ)

Jump to S1C1
Energy calculated at B3LYP/6-311G**
 hartrees
Energy at 0K-327.362108
Energy at 298.15K-327.360390
HF Energy-327.362108
Nuclear repulsion energy27.008851
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 B3LYP/6-311G**
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 1085 1049 7.32      

Unscaled Zero Point Vibrational Energy (zpe) 542.6 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 524.6 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 B3LYP/6-311G**
B
0.74110

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-311G**

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.494
C2 0.000 0.000 -1.152

Atom - Atom Distances (Å)
  Si1 C2
Si11.6458
C21.6458

picture of silicon monocarbide state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.348      
2 C -0.348      


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 2.085 2.085
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.959 0.000 0.000
y 0.000 -19.959 0.000
z 0.000 0.000 -15.607
Traceless
 xyz
x -2.176 0.000 0.000
y 0.000 -2.176 0.000
z 0.000 0.000 4.352
Polar
3z2-r28.703
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 25.685 0.000 0.000
y 0.000 25.685 0.000
z 0.000 0.000 7.759


<r2> (average value of r2) Å2
<r2> 22.936
(<r2>)1/2 4.789