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

using model chemistry: CISD/3-21G*

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/3-21G*
 hartrees
Energy at 0K-50.232762
Energy at 298.15K-50.232521
HF Energy-50.135863
Nuclear repulsion energy15.227268
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/3-21G*
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 2837 2651 0.00      
2 Σg 1268 1185 0.00      
3 Σu 2787 2604 35.97      
4 Πg 407 380 0.00      
4 Πg 407 380 0.00      
5 Πu 604 564 2.55      
5 Πu 604 564 2.55      

Unscaled Zero Point Vibrational Energy (zpe) 4456.1 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 4163.8 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/3-21G*
B
0.82351

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/3-21G*

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.764
B2 0.000 0.000 -0.764
H3 0.000 0.000 1.946
H4 0.000 0.000 -1.946

Atom - Atom Distances (Å)
  B1 B2 H3 H4
B11.52711.18242.7096
B21.52712.70961.1824
H31.18242.70963.8920
H42.70961.18243.8920

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