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 SO2 (Sulfur dioxide)

using model chemistry: mPW1PW91/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/cc-pVDZ
 hartrees
Energy at 0K-548.565006
Energy at 298.15K-548.565917
HF Energy-548.565006
Nuclear repulsion energy105.613964
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 mPW1PW91/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 A1 1156 1107 29.80 21.13 0.20 0.33
2 A1 510 489 34.10 4.23 0.73 0.85
3 B2 1331 1276 177.85 9.97 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1498.5 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 1436.0 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 mPW1PW91/cc-pVDZ
ABC
1.82587 0.33279 0.28149

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.380
O2 0.000 1.258 -0.380
O3 0.000 -1.258 -0.380

Atom - Atom Distances (Å)
  S1 O2 O3
S11.47001.4700
O21.47002.5167
O31.47002.5167

picture of Sulfur dioxide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O2 S1 O3 117.749
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.718      
2 O -0.359      
3 O -0.359      


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 1.891 1.891
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.403 0.000 0.000
y 0.000 -26.689 0.000
z 0.000 0.000 -22.160
Traceless
 xyz
x 4.022 0.000 0.000
y 0.000 -5.408 0.000
z 0.000 0.000 1.386
Polar
3z2-r22.772
x2-y26.287
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.740 0.000 0.000
y 0.000 4.185 0.000
z 0.000 0.000 2.222


<r2> (average value of r2) Å2
<r2> 44.372
(<r2>)1/2 6.661