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 HBBH (Diborane(2))

using model chemistry: PBE1PBE/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 3ΣG
Energy calculated at PBE1PBE/6-31G
 hartrees
Energy at 0K-50.675468
Energy at 298.15K-50.675535
HF Energy-50.675468
Nuclear repulsion energy15.292059
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 PBE1PBE/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 2848 2722 0.00      
2 Σg 1275 1218 0.00      
3 Σu 2803 2679 33.91      
4 Πg 595 569 0.00      
4 Πg 595 569 0.00      
5 Πu 619 592 1.92      
5 Πu 619 592 1.92      

Unscaled Zero Point Vibrational Energy (zpe) 4676.2 cm-1
Scaled (by 0.9559) Zero Point Vibrational Energy (zpe) 4470.0 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 PBE1PBE/6-31G
B
0.83118

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.760
B2 0.000 0.000 -0.760
H3 0.000 0.000 1.939
H4 0.000 0.000 -1.939

Atom - Atom Distances (Å)
  B1 B2 H3 H4
B11.51901.17972.6987
B21.51902.69871.1797
H31.17972.69873.8785
H42.69871.17973.8785

picture of Diborane(2) state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
B1 B2 H4 180.000 B2 B1 H3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -0.089      
2 B -0.089      
3 H 0.089      
4 H 0.089      


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 -13.479 0.000 0.000
y 0.000 -13.479 0.000
z 0.000 0.000 -12.378
Traceless
 xyz
x -0.550 0.000 0.000
y 0.000 -0.550 0.000
z 0.000 0.000 1.101
Polar
3z2-r22.201
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 2.088 0.000 0.000
y 0.000 2.088 0.000
z 0.000 0.000 6.603


<r2> (average value of r2) Å2
<r2> 21.479
(<r2>)1/2 4.635