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

using model chemistry: MP2=FULL/6-31G(2df,p)

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 MP2=FULL/6-31G(2df,p)
 hartrees
Energy at 0K-50.586039
Energy at 298.15K-50.586290
HF Energy-50.426876
Nuclear repulsion energy15.460775
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 MP2=FULL/6-31G(2df,p)
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 2917 2741 0.00      
2 Σg 1293 1216 0.00      
3 Σu 2875 2702 12.18      
4 Πg 698 656 0.00      
4 Πg 698 656 0.00      
5 Πu 688 646 1.66      
5 Πu 688 646 1.66      

Unscaled Zero Point Vibrational Energy (zpe) 4928.1 cm-1
Scaled (by 0.9399) Zero Point Vibrational Energy (zpe) 4631.9 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 MP2=FULL/6-31G(2df,p)
B
0.85011

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G(2df,p)

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.751
B2 0.000 0.000 -0.751
H3 0.000 0.000 1.919
H4 0.000 0.000 -1.919

Atom - Atom Distances (Å)
  B1 B2 H3 H4
B11.50121.16862.6698
B21.50122.66981.1686
H31.16862.66983.8384
H42.66981.16863.8384

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