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

using model chemistry: MP2/CEP-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/CEP-31G*
 hartrees
Energy at 0K-7.768586
Energy at 298.15K-7.771080
HF Energy-7.641453
Nuclear repulsion energy11.701807
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/CEP-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 2617 2484 0.00      
2 A1 1252 1189 0.00      
3 A1 886 841 0.00      
4 B1 496 471 0.00      
5 B2 2591 2460 133.74      
6 B2 1165 1106 19.13      
7 E 2672 2537 147.91      
7 E 2672 2537 147.91      
8 E 1022 970 19.78      
8 E 1022 970 19.78      
9 E 452 429 1.15      
9 E 452 429 1.15      

Unscaled Zero Point Vibrational Energy (zpe) 8648.5 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 8210.9 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 MP2/CEP-31G*
ABC
3.96498 0.62659 0.62659

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.849
B2 0.000 0.000 -0.849
H3 0.000 1.027 1.487
H4 0.000 -1.027 1.487
H5 1.027 0.000 -1.487
H6 -1.027 0.000 -1.487

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.69781.20891.20892.55142.5514
B21.69782.55142.55141.20891.2089
H31.20892.55142.05393.30913.3091
H41.20892.55142.05393.30913.3091
H52.55141.20893.30913.30912.0539
H62.55141.20893.30913.30912.0539

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 121.841 B1 B2 H6 121.841
B2 B1 H3 121.841 B2 B1 H4 121.841
H3 B1 H4 116.318 H5 B2 H6 116.318
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability