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

using model chemistry: QCISD(TQ)/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 QCISD(TQ)/6-31G*
 hartrees
Energy at 0K-51.814445
Energy at 298.15K-51.816944
HF Energy-51.634257
Nuclear repulsion energy22.181084
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)/6-31G*
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 1240 1240        
2 A1 880 880        
3 B1 526 526        
4 B2 1179 1179        
5 E 2658 2658        
6 E 2658 2658        
7 E 2604 2604        
7 E 2584 2584        
8 E 1014 1014        
8 E 1014 1014        
9 E 443 443        
9 E 442 442        

Unscaled Zero Point Vibrational Energy (zpe) 8620.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8620.9 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)/6-31G*
ABC
4.01915 0.65368 0.65368

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(TQ)/6-31G*

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.826
B2 0.000 0.000 -0.826
H3 0.000 1.020 1.466
H4 0.000 -1.020 1.466
H5 1.020 0.000 -1.466
H6 -1.020 0.000 -1.466

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.65241.20401.20402.50872.5087
B21.65242.50872.50871.20401.2040
H31.20402.50872.04003.26733.2673
H41.20402.50872.04003.26733.2673
H52.50871.20403.26733.26732.0400
H62.50871.20403.26733.26732.0400

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 122.090 B1 B2 H6 122.090
B2 B1 H3 122.090 B2 B1 H4 122.090
H3 B1 H4 115.819 H5 B2 H6 115.819
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability