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 Be2 (Beryllium diatomic)

using model chemistry: wB97X-D/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 1Σg
2 1 yes D*H 3Πg

State 1 (1Σg)

Jump to S2C1
Energy calculated at wB97X-D/6-31G*
 hartrees
Energy at 0K-29.301883
Energy at 298.15K-29.299905
HF Energy-29.301883
Nuclear repulsion energy 
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 wB97X-D/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 Σg 670 635 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 334.8 cm-1
Scaled (by 0.9485) Zero Point Vibrational Energy (zpe) 317.6 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 wB97X-D/6-31G*
B
0.90755

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/6-31G*

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Be1 0.000 0.000 0.969
Be2 0.000 0.000 -0.969

Atom - Atom Distances (Å)
  Be1 Be2
Be11.9388
Be21.9388

picture of Beryllium diatomic state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Be 0.000      
2 Be 0.000      


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 -16.685 0.000 0.000
y 0.000 -11.780 0.000
z 0.000 0.000 -11.189
Traceless
 xyz
x -5.201 0.000 0.000
y 0.000 2.157 0.000
z 0.000 0.000 3.044
Polar
3z2-r26.087
x2-y2-4.905
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x -8.817 0.000 0.000
y 0.000 6.407 0.000
z 0.000 0.000 19.410


<r2> (average value of r2) Å2
<r2> 16.500
(<r2>)1/2 4.062

State 2 (3Πg)

Jump to S1C1
Energy calculated at wB97X-D/6-31G*
 hartrees
Energy at 0K-29.301883
Energy at 298.15K-29.299905
HF Energy-29.301883
Nuclear repulsion energy 
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 wB97X-D/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 Σg 670 635 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 334.8 cm-1
Scaled (by 0.9485) Zero Point Vibrational Energy (zpe) 317.6 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 wB97X-D/6-31G*
B
0.90755

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/6-31G*

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Be1 0.000 0.000 0.969
Be2 0.000 0.000 -0.969

Atom - Atom Distances (Å)
  Be1 Be2
Be11.9388
Be21.9388

picture of Beryllium diatomic state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Be 0.000      
2 Be 0.000      


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 -16.685 0.000 0.000
y 0.000 -11.780 0.000
z 0.000 0.000 -11.189
Traceless
 xyz
x -5.201 0.000 0.000
y 0.000 2.157 0.000
z 0.000 0.000 3.044
Polar
3z2-r26.087
x2-y2-4.905
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x -8.817 0.000 0.000
y 0.000 6.407 0.000
z 0.000 0.000 19.410


<r2> (average value of r2) Å2
<r2> 16.500
(<r2>)1/2 4.062