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

using model chemistry: TPSSh/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at TPSSh/6-31+G**
 hartrees
Energy at 0K-52.052871
Energy at 298.15K-52.055319
HF Energy-52.052871
Nuclear repulsion energy22.261121
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 TPSSh/6-31+G**
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 2496 0.00      
2 A1 1220 1174 0.00      
3 A1 869 836 0.00      
4 B1 552 532 0.00      
5 B2 2570 2474 88.59      
6 B2 1158 1114 4.71      
7 E 2634 2536 104.93      
7 E 2634 2536 104.93      
8 E 999 962 26.70      
8 E 999 962 26.70      
9 E 405 390 3.34      
9 E 405 390 3.34      

Unscaled Zero Point Vibrational Energy (zpe) 8519.9 cm-1
Scaled (by 0.9625) Zero Point Vibrational Energy (zpe) 8200.4 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 TPSSh/6-31+G**
ABC
4.05765 0.65836 0.65836

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

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.824
B2 0.000 0.000 -0.824
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
B11.64831.19971.19972.49982.4998
B21.64832.49982.49981.19971.1997
H31.19972.49982.03593.25373.2537
H41.19972.49982.03593.25373.2537
H52.49981.19973.25373.25372.0359
H62.49981.19973.25373.25372.0359

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 121.948 B1 B2 H6 121.948
B2 B1 H3 121.948 B2 B1 H4 121.948
H3 B1 H4 116.105 H5 B2 H6 116.105
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B 0.020      
2 B 0.020      
3 H -0.010      
4 H -0.010      
5 H -0.010      
6 H -0.010      


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


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.555 0.000 0.000
y 0.000 3.555 0.000
z 0.000 0.000 5.920


<r2> (average value of r2) Å2
<r2> 29.009
(<r2>)1/2 5.386