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

using model chemistry: MP4/6-31G*

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 MP4/6-31G*
 hartrees
Energy at 0K-50.564699
Energy at 298.15K-50.564440
HF Energy-50.420312
Nuclear repulsion energy15.327267
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 MP4/6-31G*
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 2860 2731 0.00      
2 Σg 1283 1225 0.00      
3 Σu 2822 2695 0.00      
4 Πg 402 384 0.00      
4 Πg 402 384 0.00      
5 Πu 602 575 0.00      
5 Πu 602 575 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 4486.5 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 4283.7 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 MP4/6-31G*
B
0.83649

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

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 1.937
H4 0.000 0.000 -1.937

Atom - Atom Distances (Å)
  B1 B2 H3 H4
B11.51211.18142.6935
B21.51212.69351.1814
H31.18142.69353.8749
H42.69351.18143.8749

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