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

using model chemistry: CCSD/6-311G*

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/6-311G*
 hartrees
Energy at 0K-50.582094
Energy at 298.15K-50.582033
HF Energy-50.430308
Nuclear repulsion energy15.311423
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/6-311G*
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 2803 2673 0.00      
2 Σg 1261 1202 0.00      
3 Σu 2760 2632 21.85      
4 Πg 496 473 0.00      
4 Πg 496 473 0.00      
5 Πu 624 595 0.02      
5 Πu 624 595 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 4531.9 cm-1
Scaled (by 0.9535) Zero Point Vibrational Energy (zpe) 4321.1 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/6-311G*
B
0.83410

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-311G*

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.758
B2 0.000 0.000 -0.758
H3 0.000 0.000 1.939
H4 0.000 0.000 -1.939

Atom - Atom Distances (Å)
  B1 B2 H3 H4
B11.51501.18122.6962
B21.51502.69621.1812
H31.18122.69623.8774
H42.69621.18123.8774

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