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

using model chemistry: CCSD(T)/TZVP

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(T)/TZVP
 hartrees
Energy at 0K-50.604995
Energy at 298.15K-50.604854
HF Energy-50.437412
Nuclear repulsion energy15.343158
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(T)/TZVP
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 2844 2738 0.00      
2 Σg 1261 1214 0.00      
3 Σu 2805 2700 0.00      
4 Πg 463 446 0.00      
4 Πg 463 446 0.00      
5 Πu 595 572 0.00      
5 Πu 595 572 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 4513.1 cm-1
Scaled (by 0.9625) Zero Point Vibrational Energy (zpe) 4343.8 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 CCSD(T)/TZVP
B
0.83638

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/TZVP

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