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

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G*
 hartrees
Energy at 0K-51.786498
Energy at 298.15K-51.789029
HF Energy-51.634431
Nuclear repulsion energy22.244162
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=FULL/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 2667 2513 0.00      
2 A1 1268 1195 0.00      
3 A1 883 832 0.00      
4 B1 530 500 0.00      
5 B2 2648 2495 78.99      
6 B2 1208 1138 13.26      
7 E 2728 2570 84.82      
7 E 2728 2570 84.82      
8 E 1034 974 28.59      
8 E 1034 974 28.59      
9 E 453 426 4.29      
9 E 453 426 4.29      

Unscaled Zero Point Vibrational Energy (zpe) 8816.0 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 8306.4 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 MP2=FULL/6-31G*
ABC
4.05209 0.65558 0.65558

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/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 1.016 1.460
H4 0.000 -1.016 1.460
H5 1.016 0.000 -1.460
H6 -1.016 0.000 -1.460

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.65291.19741.19742.50212.5021
B21.65292.50212.50211.19741.1974
H31.19742.50212.03173.25473.2547
H41.19742.50212.03173.25473.2547
H52.50211.19743.25473.25472.0317
H62.50211.19743.25473.25472.0317

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 121.959 B1 B2 H6 121.959
B2 B1 H3 121.959 B2 B1 H4 121.959
H3 B1 H4 116.082 H5 B2 H6 116.082
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability