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

using model chemistry: QCISD(TQ)/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(TQ)/cc-pVTZ
 hartrees
Energy at 0K-50.630028
Energy at 298.15K-50.630072
HF Energy-50.438849
Nuclear repulsion energy15.343157
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(TQ)/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 2819 2819 0.00      
2 Σg 1255 1255 0.00      
3 Σu 2776 2776 0.00      
4 Πg 573 573 0.00      
4 Πg 573 573 0.00      
5 Πu 614 614 0.00      
5 Πu 614 614 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 4611.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4611.8 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 QCISD(TQ)/cc-pVTZ
B
0.83638

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

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 1.933
H4 0.000 0.000 -1.933

Atom - Atom Distances (Å)
  B1 B2 H3 H4
B11.51451.17552.6900
B21.51452.69001.1755
H31.17552.69003.8655
H42.69001.17553.8655

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