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

using model chemistry: PBEPBEultrafine/daug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBEPBEultrafine/daug-cc-pVTZ
 hartrees
Energy at 0K-365.315531
Energy at 298.15K 
HF Energy-365.315531
Nuclear repulsion energy62.804111
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 PBEPBEultrafine/daug-cc-pVTZ
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 1768 1768 20.72 35.60 0.04 0.08
2 A1 779 779 144.66 45.49 0.16 0.27
3 B2 233 233 95.57 14.13 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1389.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 1389.7 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 PBEPBEultrafine/daug-cc-pVTZ
ABC
1.73185 0.42832 0.34339

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/daug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.806
C2 0.000 0.637 -0.940
C3 0.000 -0.637 -0.940

Atom - Atom Distances (Å)
  Si1 C2 C3
Si11.85801.8580
C21.85801.2737
C31.85801.2737

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 40.090
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.523      
2 C -0.261      
3 C -0.261      


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 2.340 2.340
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.063 0.000 0.000
y 0.000 -26.391 0.000
z 0.000 0.000 -25.394
Traceless
 xyz
x 2.829 0.000 0.000
y 0.000 -2.162 0.000
z 0.000 0.000 -0.667
Polar
3z2-r2-1.335
x2-y23.328
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.567 0.000 0.000
y 0.000 7.058 0.000
z 0.000 0.000 8.133


<r2> (average value of r2) Å2
<r2> 40.136
(<r2>)1/2 6.335