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All results from a given calculation for HBBH (Diborane(2))

using model chemistry: PBEPBE/6-311+G(3df,2p)

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 PBEPBE/6-311+G(3df,2p)
 hartrees
Energy at 0K-50.683881
Energy at 298.15K-50.683833
HF Energy-50.683881
Nuclear repulsion energy15.280399
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 PBEPBE/6-311+G(3df,2p)
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 2757 2735 0.00      
2 Σg 1225 1215 0.00      
3 Σu 2716 2694 24.36      
4 Πg 540 536 0.00      
4 Πg 540 536 0.00      
5 Πu 577 572 0.05      
5 Πu 577 572 0.05      

Unscaled Zero Point Vibrational Energy (zpe) 4466.0 cm-1
Scaled (by 0.9918) Zero Point Vibrational Energy (zpe) 4429.4 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 PBEPBE/6-311+G(3df,2p)
B
0.83026

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311+G(3df,2p)

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 1.942
H4 0.000 0.000 -1.942

Atom - Atom Distances (Å)
  B1 B2 H3 H4
B11.51931.18192.7012
B21.51932.70121.1819
H31.18192.70123.8831
H42.70121.18193.8831

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 PBEPBE/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -0.195      
2 B -0.195      
3 H 0.195      
4 H 0.195      


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 -14.184 0.000 0.000
y 0.000 -14.184 0.000
z 0.000 0.000 -12.467
Traceless
 xyz
x -0.859 0.000 0.000
y 0.000 -0.859 0.000
z 0.000 0.000 1.717
Polar
3z2-r23.434
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 4.381 0.000 0.000
y 0.000 4.381 0.000
z 0.000 0.000 7.301


<r2> (average value of r2) Å2
<r2> 21.811
(<r2>)1/2 4.670