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All results from a given calculation for SiC2 (Silicon dicarbide)

using model chemistry: wB97X-D/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at wB97X-D/CEP-31G
 hartrees
Energy at 0K-14.926463
Energy at 298.15K 
HF Energy-14.926463
Nuclear repulsion energy15.175671
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 wB97X-D/CEP-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 1756 1756 34.31 41.57 0.13 0.24
2 A1 739 739 142.60 49.33 0.33 0.50
3 B2 327i 327i 76.78 11.38 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1083.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 1083.6 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 wB97X-D/CEP-31G
ABC
1.61918 0.39388 0.31681

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.840
C2 0.000 0.659 -0.980
C3 0.000 -0.659 -0.980

Atom - Atom Distances (Å)
  Si1 C2 C3
Si11.93571.9357
C21.93571.3173
C31.93571.3173

picture of Silicon dicarbide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C2 Si1 C3 39.785
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.350      
2 C -0.175      
3 C -0.175      


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 2.863 2.863
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.997 0.000 0.000
y 0.000 -26.093 0.000
z 0.000 0.000 -25.897
Traceless
 xyz
x 3.998 0.000 0.000
y 0.000 -2.146 0.000
z 0.000 0.000 -1.852
Polar
3z2-r2-3.704
x2-y24.096
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.104 0.000 0.000
y 0.000 6.829 0.000
z 0.000 0.000 7.526


<r2> (average value of r2) Å2
<r2> 29.382
(<r2>)1/2 5.421