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All results from a given calculation for H2Se2 (hydrogen diselenide)

using model chemistry: PBE1PBE/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 PBE1PBE/6-31G**
 hartrees
Energy at 0K-4799.307732
Energy at 298.15K 
HF Energy-4799.307732
Nuclear repulsion energy301.470803
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 PBE1PBE/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 2410 2297 17.48 186.11 0.09 0.17
2 A 786 750 0.00 36.18 0.50 0.67
3 A 400 381 6.40 14.71 0.75 0.86
4 A 316 301 0.00 8.61 0.25 0.40
5 B 2412 2299 26.18 143.47 0.75 0.86
6 B 792 755 14.61 14.47 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3557.9 cm-1
Scaled (by 0.9531) Zero Point Vibrational Energy (zpe) 3391.0 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 PBE1PBE/6-31G**
ABC
3.89365 0.07690 0.07690

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Se1 0.000 1.156 -0.030
Se2 0.000 -1.156 -0.030
H3 1.046 1.337 1.012
H4 -1.046 -1.337 1.012

Atom - Atom Distances (Å)
  Se1 Se2 H3 H4
Se12.31101.48752.8967
Se22.31102.89671.4875
H31.48752.89673.3949
H42.89671.48753.3949

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 96.994 Se2 Se1 H3 96.994
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Se -0.154      
2 Se -0.154      
3 H 0.154      
4 H 0.154      


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 1.007 1.007
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -37.462 1.904 0.000
y 1.904 -35.680 0.000
z 0.000 0.000 -37.547
Traceless
 xyz
x -0.848 1.904 0.000
y 1.904 1.824 0.000
z 0.000 0.000 -0.976
Polar
3z2-r2-1.951
x2-y2-1.781
xy1.904
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.184 0.528 0.000
y 0.528 9.090 0.000
z 0.000 0.000 5.134


<r2> (average value of r2) Å2
<r2> 121.709
(<r2>)1/2 11.032