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

using model chemistry: QCISD/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 QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-50.603411
Energy at 298.15K-50.603504
HF Energy-50.426789
Nuclear repulsion energy15.390170
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/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 2871 2720 0.00      
2 Σg 1285 1217 0.00      
3 Σu 2830 2681 16.54      
4 Πg 590 559 0.00      
4 Πg 590 559 0.00      
5 Πu 644 610 1.24      
5 Πu 644 610 1.24      

Unscaled Zero Point Vibrational Energy (zpe) 4726.2 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 4477.6 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/6-31G(2df,p)
B
0.84236

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

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.754
B2 0.000 0.000 -0.754
H3 0.000 0.000 1.928
H4 0.000 0.000 -1.928

Atom - Atom Distances (Å)
  B1 B2 H3 H4
B11.50811.17392.6820
B21.50812.68201.1739
H31.17392.68203.8559
H42.68201.17393.8559

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