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 H2Se2 (hydrogen diselenide)

using model chemistry: TPSSh/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at TPSSh/cc-pVTZ
 hartrees
Energy at 0K-4804.276225
Energy at 298.15K 
HF Energy-4804.276225
Nuclear repulsion energy298.743519
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 TPSSh/cc-pVTZ
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 2384 2308 13.14 225.80 0.08 0.15
2 A 737 714 0.03 24.38 0.41 0.58
3 A 370 358 5.01 13.03 0.75 0.86
4 A 289 280 0.01 9.72 0.22 0.37
5 B 2385 2310 19.46 127.61 0.75 0.86
6 B 735 712 12.99 7.52 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3450.0 cm-1
Scaled (by 0.9683) Zero Point Vibrational Energy (zpe) 3340.6 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 TPSSh/cc-pVTZ
ABC
3.95522 0.07527 0.07527

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Se1 0.000 1.168 -0.029
Se2 0.000 -1.168 -0.029
H3 1.039 1.338 1.003
H4 -1.039 -1.338 1.003

Atom - Atom Distances (Å)
  Se1 Se2 H3 H4
Se12.33671.47462.9032
Se22.33672.90321.4746
H31.47462.90323.3886
H42.90321.47463.3886

picture of hydrogen diselenide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Se1 Se2 H4 96.614 Se2 Se1 H3 96.614
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Se -0.052      
2 Se -0.052      
3 H 0.052      
4 H 0.052      


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 0.854 0.854
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.938 0.454 0.000
y 0.454 10.342 0.000
z 0.000 0.000 5.899


<r2> (average value of r2) Å2
<r2> 123.790
(<r2>)1/2 11.126