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 BeO (beryllium oxide)

using model chemistry: mPW1PW91/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at mPW1PW91/6-31G
 hartrees
Energy at 0K-89.840619
Energy at 298.15K-89.839700
HF Energy-89.840619
Nuclear repulsion energy12.534818
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 mPW1PW91/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 1483 1404 9.05      

Unscaled Zero Point Vibrational Energy (zpe) 741.4 cm-1
Scaled (by 0.9466) Zero Point Vibrational Energy (zpe) 701.8 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 mPW1PW91/6-31G
B
1.60244

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Be1 0.000 0.000 -0.901
O2 0.000 0.000 0.450

Atom - Atom Distances (Å)
  Be1 O2
Be11.3509
O21.3509

picture of beryllium oxide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Be 0.476      
2 O -0.476      


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 -5.893 5.893
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.196 0.000 0.000
y 0.000 -10.196 0.000
z 0.000 0.000 -4.352
Traceless
 xyz
x -2.922 0.000 0.000
y 0.000 -2.922 0.000
z 0.000 0.000 5.844
Polar
3z2-r211.687
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 3.209 0.000 0.000
y 0.000 3.209 0.000
z 0.000 0.000 3.368


<r2> (average value of r2) Å2
<r2> 10.018
(<r2>)1/2 3.165