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: mPW1PW91/aug-cc-pV(T+d)Z

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/aug-cc-pV(T+d)Z
 hartrees
Energy at 0K-797.665655
Energy at 298.15K-797.667896
HF Energy-797.665655
Nuclear repulsion energy85.375097
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/aug-cc-pV(T+d)Z
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 2667 2667 0.16      
2 A 907 907 0.13      
3 A 532 532 0.00      
4 A 453 453 12.79      
5 B 2669 2669 2.76      
6 B 907 907 7.14      

Unscaled Zero Point Vibrational Energy (zpe) 4067.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4067.9 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 mPW1PW91/aug-cc-pV(T+d)Z
ABC
4.91834 0.23448 0.23439

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pV(T+d)Z

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 1.024 -0.055
S2 0.000 -1.024 -0.055
H3 0.947 1.226 0.878
H4 -0.947 -1.226 0.878

Atom - Atom Distances (Å)
  S1 S2 H3 H4
S12.04851.34452.6139
S22.04852.61391.3445
H31.34452.61393.0992
H42.61391.34453.0992

picture of Disulfane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 S2 H4 98.651 S2 S1 H3 98.651
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pV(T+d)Z Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.147      
2 S -0.147      
3 H 0.147      
4 H 0.147      


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 1.144 1.144
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.747 2.036 0.000
y 2.036 -25.982 0.000
z 0.000 0.000 -26.975
Traceless
 xyz
x -0.268 2.036 0.000
y 2.036 0.878 0.000
z 0.000 0.000 -0.610
Polar
3z2-r2-1.220
x2-y2-0.764
xy2.036
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.672 0.358 0.000
y 0.358 8.323 0.000
z 0.000 0.000 5.637


<r2> (average value of r2) Å2
<r2> 56.604
(<r2>)1/2 7.524