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

using model chemistry: MP2/6-311+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 MP2/6-311+G(3df,2p)
 hartrees
Energy at 0K-51.849453
Energy at 298.15K-51.851927
HF Energy-51.650205
Nuclear repulsion energy22.307485
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 MP2/6-311+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 2619 2471 0.00      
2 A1 1236 1166 0.00      
3 A1 862 813 0.00      
4 B1 531 501 0.00      
5 B2 2599 2452 76.74      
6 B2 1176 1109 12.38      
7 E 2677 2525 88.85      
7 E 2677 2525 88.85      
8 E 1014 956 28.10      
8 E 1014 956 28.10      
9 E 418 395 6.75      
9 E 418 395 6.75      

Unscaled Zero Point Vibrational Energy (zpe) 8620.0 cm-1
Scaled (by 0.9434) Zero Point Vibrational Energy (zpe) 8132.1 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 MP2/6-311+G(3df,2p)
ABC
4.06225 0.65930 0.65930

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311+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 1.015 1.453
H4 0.000 -1.015 1.453
H5 1.015 0.000 -1.453
H6 -1.015 0.000 -1.453

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.64991.19321.19322.49362.4936
B21.64992.49362.49361.19321.1932
H31.19322.49362.02923.24073.2407
H41.19322.49362.02923.24073.2407
H52.49361.19323.24073.24072.0292
H62.49361.19323.24073.24072.0292

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 121.752 B1 B2 H6 121.752
B2 B1 H3 121.752 B2 B1 H4 121.752
H3 B1 H4 116.497 H5 B2 H6 116.497
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability