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 H2F2 (Hydrogen fluoride dimer)

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 CS 1Ag
Energy calculated at TPSSh/cc-pVTZ
 hartrees
Energy at 0K-200.958029
Energy at 298.15K 
HF Energy-200.958029
Nuclear repulsion energy31.153210
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' 3984 3858 244.15      
2 A' 3956 3831 8.77      
3 A' 635 615 0.98      
4 A' 168 163 0.38      
5 A' 183i 177i 517.43      
6 A" 452 438 309.42      

Unscaled Zero Point Vibrational Energy (zpe) 4505.9 cm-1
Scaled (by 0.9683) Zero Point Vibrational Energy (zpe) 4363.1 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 TPSSh/cc-pVTZ
ABC
16.94647 0.25045 0.24680

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -0.702 -0.634 0.000
F2 0.003 1.253 0.000
H3 0.650 0.579 0.000
F4 0.003 -1.247 0.000

Atom - Atom Distances (Å)
  H1 F2 H3 F4
H12.01411.81600.9343
F22.01410.93522.5003
H31.81600.93521.9371
F40.93432.50031.9371

picture of Hydrogen fluoride dimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 F2 H3 64.305 H1 F4 H3 68.488
F2 H1 F4 110.565 F2 H3 F4 116.643
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 H 0.331      
2 F -0.332      
3 H 0.328      
4 F -0.327      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.135 -0.194 0.000 0.236
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 1.296 -0.195 0.000
y -0.195 1.461 0.000
z 0.000 0.000 0.825


<r2> (average value of r2) Å2
<r2> 40.746
(<r2>)1/2 6.383