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

using model chemistry: CISD/6-311G*

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 CISD/6-311G*
 hartrees
Energy at 0K-50.575016
Energy at 298.15K-50.574993
HF Energy-50.430405
Nuclear repulsion energy15.341956
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 CISD/6-311G*
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 2828 2617 0.00      
2 Σg 1273 1178 0.00      
3 Σu 2785 2577 22.97      
4 Πg 515 477 0.00      
4 Πg 515 477 0.00      
5 Πu 632 585 0.08      
5 Πu 632 585 0.08      

Unscaled Zero Point Vibrational Energy (zpe) 4590.2 cm-1
Scaled (by 0.9253) Zero Point Vibrational Energy (zpe) 4247.3 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 CISD/6-311G*
B
0.83742

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-311G*

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.756
B2 0.000 0.000 -0.756
H3 0.000 0.000 1.935
H4 0.000 0.000 -1.935

Atom - Atom Distances (Å)
  B1 B2 H3 H4
B11.51201.17882.6908
B21.51202.69081.1788
H31.17882.69083.8696
H42.69081.17883.8696

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