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: M06-2X/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at M06-2X/6-31G
 hartrees
Energy at 0K-797.421187
Energy at 298.15K-797.422999
HF Energy-797.421187
Nuclear repulsion energy79.353652
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 M06-2X/6-31G
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 2533 2533 25.66      
2 A 851 851 1.60      
3 A 458 458 0.01      
4 A 254 254 37.41      
5 B 2534 2534 34.13      
6 B 822 822 3.01      

Unscaled Zero Point Vibrational Energy (zpe) 3726.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3726.1 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 M06-2X/6-31G
ABC
4.66690 0.19946 0.19838

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/6-31G

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 1.115 -0.053
S2 0.000 -1.115 -0.053
H3 1.027 1.286 0.845
H4 -1.027 -1.286 0.845

Atom - Atom Distances (Å)
  S1 S2 H3 H4
S12.23031.37452.7611
S22.23032.76111.3745
H31.37452.76113.2903
H42.76111.37453.2903

picture of Disulfane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 S2 H4 97.120 S2 S1 H3 97.120
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.084      
2 S -0.084      
3 H 0.084      
4 H 0.084      


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 1.856 1.856
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.080 3.190 0.000
y 3.190 -27.594 0.000
z 0.000 0.000 -28.232
Traceless
 xyz
x 0.833 3.190 0.000
y 3.190 0.062 0.000
z 0.000 0.000 -0.896
Polar
3z2-r2-1.792
x2-y20.514
xy3.190
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.602 0.641 0.000
y 0.641 7.860 0.000
z 0.000 0.000 3.179


<r2> (average value of r2) Å2
<r2> 63.986
(<r2>)1/2 7.999