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

using model chemistry: TPSSh/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-52.065242
Energy at 298.15K-52.067682
HF Energy-52.065242
Nuclear repulsion energy22.350753
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/cc-pVTZ
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 2570 2488 0.00      
2 A1 1209 1171 0.00      
3 A1 867 840 0.00      
4 B1 565 547 0.00      
5 B2 2549 2468 65.35      
6 B2 1149 1113 2.79      
7 E 2611 2528 82.26      
7 E 2611 2528 82.26      
8 E 996 964 24.98      
8 E 996 964 24.98      
9 E 392 380 3.54      
9 E 392 380 3.54      

Unscaled Zero Point Vibrational Energy (zpe) 8452.8 cm-1
Scaled (by 0.9683) Zero Point Vibrational Energy (zpe) 8184.8 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/cc-pVTZ
ABC
4.06442 0.66584 0.66584

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/cc-pVTZ

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.819
B2 0.000 0.000 -0.819
H3 0.000 1.017 1.453
H4 0.000 -1.017 1.453
H5 1.017 0.000 -1.453
H6 -1.017 0.000 -1.453

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.63901.19791.19792.48922.4892
B21.63902.48922.48921.19791.1979
H31.19792.48922.03403.24163.2416
H41.19792.48922.03403.24163.2416
H52.48921.19793.24163.24162.0340
H62.48921.19793.24163.24162.0340

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 121.901 B1 B2 H6 121.901
B2 B1 H3 121.901 B2 B1 H4 121.901
H3 B1 H4 116.198 H5 B2 H6 116.198
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -0.025      
2 B -0.025      
3 H 0.012      
4 H 0.012      
5 H 0.012      
6 H 0.012      


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 3.911 0.000 0.000
y 0.000 3.911 0.000
z 0.000 0.000 5.990


<r2> (average value of r2) Å2
<r2> 28.789
(<r2>)1/2 5.366