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

using model chemistry: B2PLYP=FULLultrafine/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 B2PLYP=FULLultrafine/daug-cc-pVTZ
 hartrees
Energy at 0K-365.410330
Energy at 298.15K 
HF Energy-365.252056
Nuclear repulsion energy63.184586
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=FULLultrafine/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 1796 1796 22.66 37.34 0.04 0.08
2 A1 799 799 159.45 46.22 0.16 0.28
3 B2 153 153 108.61 12.30 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1374.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 1374.0 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 B2PLYP=FULLultrafine/daug-cc-pVTZ
ABC
1.75093 0.43376 0.34764

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/daug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.801
C2 0.000 0.633 -0.934
C3 0.000 -0.633 -0.934

Atom - Atom Distances (Å)
  Si1 C2 C3
Si11.84651.8465
C21.84651.2667
C31.84651.2667

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 40.121
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP=FULLultrafine/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.489      
2 C -0.245      
3 C -0.245      


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 2.492 2.492
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.127 0.000 0.000
y 0.000 -26.525 0.000
z 0.000 0.000 -25.634
Traceless
 xyz
x 2.952 0.000 0.000
y 0.000 -2.144 0.000
z 0.000 0.000 -0.808
Polar
3z2-r2-1.616
x2-y23.397
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.481 0.000 0.000
y 0.000 6.916 0.000
z 0.000 0.000 7.870


<r2> (average value of r2) Å2
<r2> 39.927
(<r2>)1/2 6.319