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All results from a given calculation for H2S2 (Disulfane)

using model chemistry: mPW1PW91/aug-cc-pCVTZ

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-pCVTZ
 hartrees
Energy at 0K-797.669800
Energy at 298.15K 
HF Energy-797.669800
Nuclear repulsion energy85.312836
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-pCVTZ
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 2664 2664 0.18      
2 A 905 905 0.14      
3 A 532 532 0.00      
4 A 451 451 12.79      
5 B 2667 2667 2.76      
6 B 906 906 6.99      

Unscaled Zero Point Vibrational Energy (zpe) 4062.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4062.4 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 mPW1PW91/aug-cc-pCVTZ
ABC
4.91190 0.23413 0.23403

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pCVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 1.025 -0.055
S2 0.000 -1.025 -0.055
H3 0.948 1.227 0.878
H4 -0.948 -1.227 0.878

Atom - Atom Distances (Å)
  S1 S2 H3 H4
S12.05011.34532.6153
S22.05012.61531.3453
H31.34532.61533.1004
H42.61531.34533.1004

picture of Disulfane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 S2 H4 98.622 S2 S1 H3 98.622
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pCVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.179      
2 S -0.179      
3 H 0.179      
4 H 0.179      


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 -26.743 2.034 0.000
y 2.034 -26.000 0.000
z 0.000 0.000 -26.972
Traceless
 xyz
x -0.257 2.034 0.000
y 2.034 0.857 0.000
z 0.000 0.000 -0.600
Polar
3z2-r2-1.200
x2-y2-0.743
xy2.034
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.670 0.361 0.000
y 0.361 8.330 0.000
z 0.000 0.000 5.635


<r2> (average value of r2) Å2
<r2> 56.665
(<r2>)1/2 7.528