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 B2H4 (Diborane(4) D2d)

using model chemistry: B3PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at B3PW91/3-21G
 hartrees
Energy at 0K-51.720110
Energy at 298.15K-51.722581
HF Energy-51.720110
Nuclear repulsion energy22.327997
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 B3PW91/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 2593 2492 0.00      
2 A1 1201 1154 0.00      
3 A1 896 861 0.00      
4 B1 579 556 0.00      
5 B2 2571 2471 50.44      
6 B2 1147 1102 0.41      
7 E 2644 2542 56.07      
7 E 2644 2542 56.07      
8 E 978 940 28.74      
8 E 978 940 28.74      
9 E 409 393 0.19      
9 E 409 393 0.19      

Unscaled Zero Point Vibrational Energy (zpe) 8523.8 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 8193.1 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 B3PW91/3-21G
ABC
4.03018 0.66727 0.66727

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.815
B2 0.000 0.000 -0.815
H3 0.000 1.019 1.458
H4 0.000 -1.019 1.458
H5 1.019 0.000 -1.458
H6 -1.019 0.000 -1.458

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.62901.20461.20462.48992.4899
B21.62902.48992.48991.20461.2046
H31.20462.48992.03723.25163.2516
H41.20462.48992.03723.25163.2516
H52.48991.20463.25163.25162.0372
H62.48991.20463.25163.25162.0372

picture of Diborane(4) D2d state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
B1 B2 H5 122.262 B1 B2 H6 122.262
B2 B1 H3 122.262 B2 B1 H4 122.262
H3 B1 H4 115.476 H5 B2 H6 115.476
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -0.086      
2 B -0.086      
3 H 0.043      
4 H 0.043      
5 H 0.043      
6 H 0.043      


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 -14.803 0.000 0.000
y 0.000 -14.803 0.000
z 0.000 0.000 -16.177
Traceless
 xyz
x 0.687 0.000 0.000
y 0.000 0.687 0.000
z 0.000 0.000 -1.373
Polar
3z2-r2-2.746
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 3.131 0.000 0.000
y 0.000 3.131 0.000
z 0.000 0.000 5.322


<r2> (average value of r2) Å2
<r2> 28.814
(<r2>)1/2 5.368