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: B3LYP/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at B3LYP/6-31+G**
 hartrees
Energy at 0K-4800.002991
Energy at 298.15K 
HF Energy-4800.002991
Nuclear repulsion energy297.365300
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 B3LYP/6-31+G**
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 2394 2308 16.78 191.96 0.10 0.18
2 A 753 726 0.01 26.00 0.44 0.61
3 A 373 359 7.00 0.69 0.73 0.84
4 A 296 285 0.02 11.95 0.21 0.34
5 B 2395 2310 22.06 132.89 0.75 0.86
6 B 754 727 14.50 7.22 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3481.7 cm-1
Scaled (by 0.9642) Zero Point Vibrational Energy (zpe) 3357.1 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 B3LYP/6-31+G**
ABC
3.99175 0.07446 0.07445

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31+G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Se1 0.000 1.175 -0.029
Se2 0.000 -1.175 -0.029
H3 1.034 1.345 0.999
H4 -1.034 -1.345 0.999

Atom - Atom Distances (Å)
  Se1 Se2 H3 H4
Se12.34981.46792.9114
Se22.34982.91141.4679
H31.46792.91143.3928
H42.91141.46793.3928

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 96.657 Se2 Se1 H3 96.657
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Se -0.115      
2 Se -0.115      
3 H 0.115      
4 H 0.115      


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 1.004 1.004
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.278 1.937 0.000
y 1.937 -36.414 0.000
z 0.000 0.000 -38.380
Traceless
 xyz
x -0.882 1.937 0.000
y 1.937 1.915 0.000
z 0.000 0.000 -1.034
Polar
3z2-r2-2.067
x2-y2-1.865
xy1.937
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.134 0.395 0.000
y 0.395 10.075 0.000
z 0.000 0.000 6.106


<r2> (average value of r2) Å2
<r2> 125.214
(<r2>)1/2 11.190