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All results from a given calculation for HBBH (Diborane(2))

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 D*H 3ΣG
Energy calculated at MP2/CEP-31G*
 hartrees
Energy at 0K-6.530760
Energy at 298.15K-6.530774
HF Energy-6.424924
Nuclear repulsion energy7.026764
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 Σg 2869 2724 0.00      
2 Σg 1276 1211 0.00      
3 Σu 2829 2686 28.37      
4 Πg 552 524 0.00      
4 Πg 552 524 0.00      
5 Πu 627 595 0.88      
5 Πu 627 595 0.88      

Unscaled Zero Point Vibrational Energy (zpe) 4665.7 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 4429.6 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*
B
0.79515

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

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.781
B2 0.000 0.000 -0.781
H3 0.000 0.000 1.963
H4 0.000 0.000 -1.963

Atom - Atom Distances (Å)
  B1 B2 H3 H4
B11.56211.18202.7441
B21.56212.74411.1820
H31.18202.74413.9261
H42.74411.18203.9261

picture of Diborane(2) state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
B1 B2 H4 180.000 B2 B1 H3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability