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 H2S2 (Disulfane)

using model chemistry: PBEPBE/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at PBEPBE/6-311G*
 hartrees
Energy at 0K-797.243060
Energy at 298.15K-797.245113
HF Energy-797.243060
Nuclear repulsion energy83.221365
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 PBEPBE/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 2507 2481 11.59      
2 A 873 864 0.00      
3 A 471 467 1.24      
4 A 444 439 19.07      
5 B 2509 2483 20.86      
6 B 874 864 12.52      

Unscaled Zero Point Vibrational Energy (zpe) 3838.8 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 3798.9 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 PBEPBE/6-311G*
ABC
4.75255 0.22217 0.22215

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 1.044 -0.055
S2 0.000 -1.044 -0.055
H3 0.977 1.267 0.873
H4 -0.977 -1.267 0.873

Atom - Atom Distances (Å)
  S1 S2 H3 H4
S12.08711.36592.6750
S22.08712.67501.3659
H31.36592.67503.2007
H42.67501.36593.2007

picture of Disulfane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 S2 H4 99.428 S2 S1 H3 99.428
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.173      
2 S -0.173      
3 H 0.173      
4 H 0.173      


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 1.598 1.598
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.542 2.527 0.000
y 2.527 -27.035 0.000
z 0.000 0.000 -27.805
Traceless
 xyz
x -0.122 2.527 0.000
y 2.527 0.638 0.000
z 0.000 0.000 -0.516
Polar
3z2-r2-1.033
x2-y2-0.507
xy2.527
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.804 0.336 0.000
y 0.336 7.077 0.000
z 0.000 0.000 3.779


<r2> (average value of r2) Å2
<r2> 59.331
(<r2>)1/2 7.703