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 BeF2 (Beryllium fluoride)

using model chemistry: HSEh1PBE/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 1Σg
Energy calculated at HSEh1PBE/3-21G*
 hartrees
Energy at 0K-213.235735
Energy at 298.15K-213.235426
HF Energy-213.235735
Nuclear repulsion energy43.048199
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 HSEh1PBE/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σg 781 750 0.00      
2 Σu 1747 1677 171.62      
3 Πu 269 258 130.57      
3 Πu 269 258 130.57      

Unscaled Zero Point Vibrational Energy (zpe) 1532.5 cm-1
Scaled (by 0.9599) Zero Point Vibrational Energy (zpe) 1471.1 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 HSEh1PBE/3-21G*
B
0.23198

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G*

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Be1 0.000 0.000 0.000
F2 0.000 0.000 1.383
F3 0.000 0.000 -1.383

Atom - Atom Distances (Å)
  Be1 F2 F3
Be11.38291.3829
F21.38292.7659
F31.38292.7659

picture of Beryllium fluoride state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Be1 F3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Be 0.674      
2 F -0.337      
3 F -0.337      


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 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -12.531 0.000 0.000
y 0.000 -12.531 0.000
z 0.000 0.000 -20.685
Traceless
 xyz
x 4.077 0.000 0.000
y 0.000 4.077 0.000
z 0.000 0.000 -8.154
Polar
3z2-r2-16.308
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.875 0.000 0.000
y 0.000 0.875 0.000
z 0.000 0.000 1.909


<r2> (average value of r2) Å2
<r2> 43.949
(<r2>)1/2 6.629