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 Be(OH)2 (Beryllium hydroxide)

using model chemistry: ROMP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes C2 1A

Conformer 1 (C2V)

Jump to S1C2
Vibrational Frequencies calculated at ROMP2/6-31G*
Rotational Constants (cm-1) from geometry optimized at ROMP2/6-31G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at ROMP2/6-31G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2)

Jump to S1C1
Energy calculated at ROMP2/6-31G*
 hartrees
Energy at 0K-166.036030
Energy at 298.15K-166.037498
HF Energy-165.634479
Nuclear repulsion energy48.583838
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 ROMP2/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3914 3914        
2 A 734 734        
3 A 583 583        
4 A 296 296        
5 A 240 240        
6 B 3912 3912        
7 B 1540 1540        
8 B 577 577        
9 B 290 290        

Unscaled Zero Point Vibrational Energy (zpe) 6042.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6042.9 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 ROMP2/6-31G*
ABC
14.49092 0.22501 0.22496

See section I.F.4 to change rotational constant units
Geometric Data calculated at ROMP2/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Be1 0.000 0.000 -0.024
O2 0.000 1.440 -0.056
O3 0.000 -1.440 -0.056
H4 0.573 1.986 0.494
H5 -0.573 -1.986 0.494

Atom - Atom Distances (Å)
  Be1 O2 O3 H4 H5
Be11.44021.44022.13102.1310
O21.44022.87980.96373.5167
O31.44022.87983.51670.9637
H42.13100.96373.51674.1339
H52.13103.51670.96374.1339

picture of Beryllium hydroxide state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Be1 O2 H4 123.653 Be1 O3 H5 123.653
O2 Be1 O3 177.511
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROMP2/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Be 0.539      
2 O -0.715      
3 O -0.715      
4 H 0.445      
5 H 0.445      


Electric dipole moments


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 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> 51.839
(<r2>)1/2 7.200