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All results from a given calculation for H2S2 (Disulfane)

using model chemistry: mPW1PW91/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at mPW1PW91/TZVP
 hartrees
Energy at 0K-797.631558
Energy at 298.15K-797.633662
HF Energy-797.631558
Nuclear repulsion energy84.235478
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/TZVP
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 2663 2541 3.40      
2 A 898 857 0.27      
3 A 518 495 0.12      
4 A 438 418 19.94      
5 B 2665 2542 6.69      
6 B 896 855 7.08      

Unscaled Zero Point Vibrational Energy (zpe) 4039.5 cm-1
Scaled (by 0.954) Zero Point Vibrational Energy (zpe) 3853.7 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/TZVP
ABC
4.85487 0.22762 0.22756

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

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 0.952 1.234 0.885
H4 -0.952 -1.234 0.885

Atom - Atom Distances (Å)
  S1 S2 H3 H4
S12.08031.35162.6385
S22.08032.63851.3516
H31.35162.63853.1169
H42.63851.35163.1169

picture of Disulfane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 S2 H4 98.252 S2 S1 H3 98.252
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.120      
2 S -0.120      
3 H 0.120      
4 H 0.120      


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 1.506 1.506
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.731 2.431 0.000
y 2.431 -26.262 0.000
z 0.000 0.000 -27.005
Traceless
 xyz
x -0.097 2.431 0.000
y 2.431 0.606 0.000
z 0.000 0.000 -0.509
Polar
3z2-r2-1.018
x2-y2-0.468
xy2.431
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.688 0.426 0.000
y 0.426 6.712 0.000
z 0.000 0.000 3.646


<r2> (average value of r2) Å2
<r2> 57.798
(<r2>)1/2 7.603