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: wB97X-D/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at wB97X-D/aug-cc-pVQZ
 hartrees
Energy at 0K-52.040160
Energy at 298.15K-52.042598
HF Energy-52.040160
Nuclear repulsion energy 
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 wB97X-D/aug-cc-pVQZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 2561 2561 0.00      
2 A1 1204 1204 0.00      
3 A1 859 859 0.00      
4 B1 538 538 0.00      
5 B2 2540 2540 72.45      
6 B2 1142 1142 3.93      
7 E 2613 2613 85.32      
7 E 2613 2613 85.32      
8 E 987 987 27.61      
8 E 987 987 27.61      
9 E 406 406 4.29      
9 E 406 406 4.29      

Unscaled Zero Point Vibrational Energy (zpe) 8426.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8426.7 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 wB97X-D/aug-cc-pVQZ
ABC
4.05111 0.66570 0.66570

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/aug-cc-pVQZ

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.818
B2 0.000 0.000 -0.818
H3 0.000 1.016 1.452
H4 0.000 -1.016 1.452
H5 1.016 0.000 -1.452
H6 -1.016 0.000 -1.452

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.63661.19741.19742.48722.4872
B21.63662.48722.48721.19741.1974
H31.19742.48722.03203.23993.2399
H41.19742.48722.03203.23993.2399
H52.48721.19743.23993.23992.0320
H62.48721.19743.23993.23992.0320

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 121.952 B1 B2 H6 121.952
B2 B1 H3 121.952 B2 B1 H4 121.952
H3 B1 H4 116.097 H5 B2 H6 116.097
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/aug-cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B 0.400      
2 B 0.400      
3 H -0.200      
4 H -0.200      
5 H -0.200      
6 H -0.200      


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 -14.608 0.000 0.000
y 0.000 -14.608 0.000
z 0.000 0.000 -16.607
Traceless
 xyz
x 0.999 0.000 0.000
y 0.000 0.999 0.000
z 0.000 0.000 -1.999
Polar
3z2-r2-3.997
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 4.196 0.000 0.000
y 0.000 4.196 0.000
z 0.000 0.000 5.857


<r2> (average value of r2) Å2
<r2> 28.798
(<r2>)1/2 5.366