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All results from a given calculation for H2S2 (Disulfane)

using model chemistry: B3PW91/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at B3PW91/6-31+G**
 hartrees
Energy at 0K-797.478044
Energy at 298.15K-797.480136
HF Energy-797.478044
Nuclear repulsion energy84.218056
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 B3PW91/6-31+G**
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 2660 2554 6.50      
2 A 906 870 0.96      
3 A 512 492 0.15      
4 A 435 417 21.72      
5 B 2662 2556 10.39      
6 B 901 865 15.62      

Unscaled Zero Point Vibrational Energy (zpe) 4037.5 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 3876.4 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 B3PW91/6-31+G**
ABC
4.87327 0.22751 0.22735

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31+G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 1.040 -0.055
S2 0.000 -1.040 -0.055
H3 0.955 1.246 0.879
H4 -0.955 -1.246 0.879

Atom - Atom Distances (Å)
  S1 S2 H3 H4
S12.08031.35112.6473
S22.08032.64731.3511
H31.35112.64733.1387
H42.64731.35113.1387

picture of Disulfane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 S2 H4 98.747 S2 S1 H3 98.747
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.094      
2 S -0.094      
3 H 0.094      
4 H 0.094      


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 1.553 1.553
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.930 2.573 0.000
y 2.573 -26.685 0.000
z 0.000 0.000 -27.279
Traceless
 xyz
x 0.052 2.573 0.000
y 2.573 0.420 0.000
z 0.000 0.000 -0.472
Polar
3z2-r2-0.943
x2-y2-0.246
xy2.573
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.379 0.444 0.000
y 0.444 6.942 0.000
z 0.000 0.000 4.335


<r2> (average value of r2) Å2
<r2> 58.031
(<r2>)1/2 7.618