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 BeH2 (beryllium dihydride)

using model chemistry: BLYP/6-31G

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 BLYP/6-31G
 hartrees
Energy at 0K-15.887919
Energy at 298.15K-15.888338
Nuclear repulsion energy3.368166
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 BLYP/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 1991 1976 0.00      
2 Σu 2240 2223 221.11      
3 Πu 753 747 212.99      
3 Πu 753 747 212.99      

Unscaled Zero Point Vibrational Energy (zpe) 2868.6 cm-1
Scaled (by 0.9924) Zero Point Vibrational Energy (zpe) 2846.8 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 BLYP/6-31G
B
4.68952

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

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Be1 0.000 0.000 0.000
H2 0.000 0.000 1.335
H3 0.000 0.000 -1.335

Atom - Atom Distances (Å)
  Be1 H2 H3
Be11.33541.3354
H21.33542.6709
H31.33542.6709

picture of beryllium dihydride state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 Be1 H3 180.000
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Be 0.110      
2 H -0.055      
3 H -0.055      


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 -6.659 0.000 0.000
y 0.000 -6.659 0.000
z 0.000 0.000 -11.111
Traceless
 xyz
x 2.226 0.000 0.000
y 0.000 2.226 0.000
z 0.000 0.000 -4.452
Polar
3z2-r2-8.903
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 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 8.653
(<r2>)1/2 2.942