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 SiO2 (silicon dioxide)

using model chemistry: B3LYP/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 1Σg
Energy calculated at B3LYP/aug-cc-pVDZ
 hartrees
Energy at 0K-439.969998
Energy at 298.15K-439.970201
Nuclear repulsion energy87.832056
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/aug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σg 946 918 0.00      
2 Σu 1375 1335 99.96      
3 Πu 284 276 71.13      
3 Πu 284 276 71.13      

Unscaled Zero Point Vibrational Energy (zpe) 1445.0 cm-1
Scaled (by 0.9704) Zero Point Vibrational Energy (zpe) 1402.2 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/aug-cc-pVDZ
B
0.22152

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/aug-cc-pVDZ

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.000
O2 0.000 0.000 1.542
O3 0.000 0.000 -1.542

Atom - Atom Distances (Å)
  Si1 O2 O3
Si11.54241.5424
O21.54243.0847
O31.54243.0847

picture of silicon dioxide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O2 Si1 O3 180.000
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.052 0.000    
2 O -0.526 0.000    
3 O -0.526 0.000    


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 0.000 0.000
CHELPG 0.000 0.000 0.000 0.000
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.582 0.000 0.000
y 0.000 -20.582 0.000
z 0.000 0.000 -32.623
Traceless
 xyz
x 6.020 0.000 0.000
y 0.000 6.020 0.000
z 0.000 0.000 -12.041
Polar
3z2-r2-24.081
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 3.604 0.000 0.000
y 0.000 3.604 0.000
z 0.000 0.000 6.183


<r2> (average value of r2) Å2
<r2> 53.424
(<r2>)1/2 7.309