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

using model chemistry: QCISD(TQ)=FULL/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 QCISD(TQ)=FULL/6-31G*
 hartrees
Energy at 0K-50.577426
Energy at 298.15K-50.577159
HF Energy-50.420297
Nuclear repulsion energy15.326127
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(TQ)=FULL/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 2838 2838 0.00      
2 Σg 1278 1278 0.00      
3 Σu 2800 2800 0.00      
4 Πg 399 399 0.00      
4 Πg 399 399 0.00      
5 Πu 600 600 0.00      
5 Πu 600 600 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 4456.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4456.7 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(TQ)=FULL/6-31G*
B
0.83671

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(TQ)=FULL/6-31G*

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.756
B2 0.000 0.000 -0.756
H3 0.000 0.000 1.938
H4 0.000 0.000 -1.938

Atom - Atom Distances (Å)
  B1 B2 H3 H4
B11.51141.18272.6941
B21.51142.69411.1827
H31.18272.69413.8768
H42.69411.18273.8768

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