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

using model chemistry: MP3/6-31+G**

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 MP3/6-31+G**
 hartrees
Energy at 0K-50.576380
Energy at 298.15K-50.575944
HF Energy-50.425420
Nuclear repulsion energy15.365227
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 MP3/6-31+G**
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 2906 2704 0.00      
2 Σg 1283 1194 0.00      
3 Σu 2866 2667 31.47      
4 Πg 320 298 0.00      
4 Πg 320 298 0.00      
5 Πu 590 549 0.09      
5 Πu 590 549 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 4437.5 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 4129.1 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 MP3/6-31+G**
B
0.83824

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31+G**

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.757
B2 0.000 0.000 -0.757
H3 0.000 0.000 1.928
H4 0.000 0.000 -1.928

Atom - Atom Distances (Å)
  B1 B2 H3 H4
B11.51411.17092.6850
B21.51412.68501.1709
H31.17092.68503.8559
H42.68501.17093.8559

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