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

using model chemistry: QCISD/daug-cc-pVTZ

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 QCISD/daug-cc-pVTZ
 hartrees
Energy at 0K-50.625035
Energy at 298.15K-50.625092
HF Energy-50.439309
Nuclear repulsion energy15.368533
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 QCISD/daug-cc-pVTZ
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 2830 2830 0.00      
2 Σg 1269 1269 0.00      
3 Σu 2789 2789 28.48      
4 Πg 578 578 0.00      
4 Πg 578 578 0.00      
5 Πu 626 626 0.00      
5 Πu 626 626 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 4648.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4648.2 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 QCISD/daug-cc-pVTZ
B
0.83978

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/daug-cc-pVTZ

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.755
B2 0.000 0.000 -0.755
H3 0.000 0.000 1.930
H4 0.000 0.000 -1.930

Atom - Atom Distances (Å)
  B1 B2 H3 H4
B11.51081.17482.6856
B21.51082.68561.1748
H31.17482.68563.8604
H42.68561.17483.8604

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