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

using model chemistry: MP4=FULL/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 MP4=FULL/3-21G
 hartrees
Energy at 0K-50.238443
Energy at 298.15K-50.238126
HF Energy-50.135697
Nuclear repulsion energy15.197291
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 MP4=FULL/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 2833 2773 0.00      
2 Σg 1250 1224 0.00      
3 Σu 2785 2726 0.00      
4 Πg 372 364 0.00      
4 Πg 372 364 0.00      
5 Πu 595 582 0.00      
5 Πu 595 582 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 4400.4 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 4307.1 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 MP4=FULL/3-21G
B
0.82015

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/3-21G

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.765
B2 0.000 0.000 -0.765
H3 0.000 0.000 1.949
H4 0.000 0.000 -1.949

Atom - Atom Distances (Å)
  B1 B2 H3 H4
B11.53081.18332.7142
B21.53082.71421.1833
H31.18332.71423.8975
H42.71421.18333.8975

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