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

using model chemistry: MP2/aug-cc-pVQZ

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/aug-cc-pVQZ
 hartrees
Energy at 0K-51.873177
Energy at 298.15K-51.875656
HF Energy-51.655066
Nuclear repulsion energy22.336708
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/aug-cc-pVQZ
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 2625 2493 0.00      
2 A1 1237 1175 0.00      
3 A1 864 821 0.00      
4 B1 531 504 0.00      
5 B2 2606 2475 76.84      
6 B2 1175 1116 12.28      
7 E 2685 2550 89.23      
7 E 2685 2550 89.23      
8 E 1012 961 28.53      
8 E 1012 961 28.53      
9 E 421 400 6.60      
9 E 421 400 6.60      

Unscaled Zero Point Vibrational Energy (zpe) 8636.6 cm-1
Scaled (by 0.9497) Zero Point Vibrational Energy (zpe) 8202.2 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/aug-cc-pVQZ
ABC
4.06567 0.66150 0.66150

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVQZ

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.824
B2 0.000 0.000 -0.824
H3 0.000 1.014 1.450
H4 0.000 -1.014 1.450
H5 1.014 0.000 -1.450
H6 -1.014 0.000 -1.450

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.64701.19221.19222.48972.4897
B21.64702.48972.48971.19221.1922
H31.19222.48972.02833.23573.2357
H41.19222.48972.02833.23573.2357
H52.48971.19223.23573.23572.0283
H62.48971.19223.23573.23572.0283

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 121.716 B1 B2 H6 121.716
B2 B1 H3 121.716 B2 B1 H4 121.716
H3 B1 H4 116.569 H5 B2 H6 116.569
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability