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

using model chemistry: QCISD(TQ)/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at QCISD(TQ)/6-311+G(3df,2p)
 hartrees
Energy at 0K-51.892804
Energy at 298.15K-51.895251
HF Energy-51.650159
Nuclear repulsion energy22.248076
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 QCISD(TQ)/6-311+G(3df,2p)
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 1217 1217        
2 A1 856 856        
3 B1 521 521        
4 B2 1156 1156        
5 E 2619 2619        
6 E 2618 2618        
7 E 2568 2568        
7 E 2547 2547        
8 E 1000 1000        
8 E 1000 1000        
9 E 413 413        
9 E 413 413        

Unscaled Zero Point Vibrational Energy (zpe) 8463.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8463.3 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 QCISD(TQ)/6-311+G(3df,2p)
ABC
4.03776 0.65691 0.65691

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(TQ)/6-311+G(3df,2p)

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.825
B2 0.000 0.000 -0.825
H3 0.000 1.018 1.458
H4 0.000 -1.018 1.458
H5 1.018 0.000 -1.458
H6 -1.018 0.000 -1.458

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.65081.19841.19842.50022.5002
B21.65082.50022.50021.19841.1984
H31.19842.50022.03533.25243.2524
H41.19842.50022.03533.25243.2524
H52.50021.19843.25243.25242.0353
H62.50021.19843.25243.25242.0353

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 121.878 B1 B2 H6 121.878
B2 B1 H3 121.878 B2 B1 H4 121.878
H3 B1 H4 116.244 H5 B2 H6 116.244
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability