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

using model chemistry: CCSD/6-31G*

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 CCSD/6-31G*
 hartrees
Energy at 0K-50.562871
Energy at 298.15K-50.562613
HF Energy-50.420349
Nuclear repulsion energy15.340858
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 CCSD/6-31G*
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 2850 2691 0.00      
2 Σg 1292 1220 0.00      
3 Σu 2811 2655 31.01      
4 Πg 400 378 0.00      
4 Πg 400 378 0.00      
5 Πu 604 570 1.02      
5 Πu 604 570 1.02      

Unscaled Zero Point Vibrational Energy (zpe) 4481.2 cm-1
Scaled (by 0.9443) Zero Point Vibrational Energy (zpe) 4231.6 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 CCSD/6-31G*
B
0.83811

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

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 1.937
H4 0.000 0.000 -1.937

Atom - Atom Distances (Å)
  B1 B2 H3 H4
B11.51011.18182.6919
B21.51012.69191.1818
H31.18182.69193.8737
H42.69191.18183.8737

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