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All results from a given calculation for B2H4 (Diborane(4) D2d)

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 D2D 1A1
Energy calculated at PBE1PBE/6-31G
 hartrees
Energy at 0K-51.935695
Energy at 298.15K-51.938173
HF Energy-51.935695
Nuclear repulsion energy22.312576
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 A1 2592 2478 0.00      
2 A1 1209 1155 0.00      
3 A1 893 854 0.00      
4 B1 570 545 0.00      
5 B2 2567 2454 69.35      
6 B2 1149 1099 1.05      
7 E 2645 2529 81.51      
7 E 2645 2529 81.51      
8 E 987 944 27.24      
8 E 987 944 27.24      
9 E 416 398 1.01      
9 E 416 398 1.01      

Unscaled Zero Point Vibrational Energy (zpe) 8538.9 cm-1
Scaled (by 0.9559) Zero Point Vibrational Energy (zpe) 8162.3 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
ABC
4.03871 0.66502 0.66502

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

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.817
B2 0.000 0.000 -0.817
H3 0.000 1.018 1.459
H4 0.000 -1.018 1.459
H5 1.018 0.000 -1.459
H6 -1.018 0.000 -1.459

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.63321.20331.20332.49262.4926
B21.63322.49262.49261.20331.2033
H31.20332.49262.03513.25333.2533
H41.20332.49262.03513.25333.2533
H52.49261.20333.25333.25332.0351
H62.49261.20333.25333.25332.0351

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 122.259 B1 B2 H6 122.259
B2 B1 H3 122.259 B2 B1 H4 122.259
H3 B1 H4 115.481 H5 B2 H6 115.481
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 0.013      
2 B 0.013      
3 H -0.007      
4 H -0.007      
5 H -0.007      
6 H -0.007      


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 -14.326 0.000 0.000
y 0.000 -14.326 0.000
z 0.000 0.000 -16.093
Traceless
 xyz
x 0.884 0.000 0.000
y 0.000 0.884 0.000
z 0.000 0.000 -1.767
Polar
3z2-r2-3.534
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 3.179 0.000 0.000
y 0.000 3.179 0.000
z 0.000 0.000 5.269


<r2> (average value of r2) Å2
<r2> 28.638
(<r2>)1/2 5.351