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All results from a given calculation for B2H4 (Diborane(4) D2d)

using model chemistry: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-51.829638
Energy at 298.15K-51.832117
HF Energy-51.641175
Nuclear repulsion energy22.260241
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 MP2/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 2658 2510 0.00      
2 A1 1246 1176 0.00      
3 A1 864 816 0.00      
4 B1 524 495 0.00      
5 B2 2640 2494 66.32      
6 B2 1187 1121 12.41      
7 E 2721 2570 69.34      
7 E 2721 2570 69.34      
8 E 1023 966 29.93      
8 E 1023 966 29.93      
9 E 424 401 4.56      
9 E 424 401 4.56      

Unscaled Zero Point Vibrational Energy (zpe) 8727.7 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 8243.3 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 MP2/6-31G(2df,p)
ABC
4.06581 0.65507 0.65507

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.828
B2 0.000 0.000 -0.828
H3 0.000 1.014 1.458
H4 0.000 -1.014 1.458
H5 1.014 0.000 -1.458
H6 -1.014 0.000 -1.458

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.65591.19381.19382.50062.5006
B21.65592.50062.50061.19381.1938
H31.19382.50062.02833.24923.2492
H41.19382.50062.02833.24923.2492
H52.50061.19383.24923.24922.0283
H62.50061.19383.24923.24922.0283

picture of Diborane(4) D2d state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
B1 B2 H5 121.840 B1 B2 H6 121.840
B2 B1 H3 121.840 B2 B1 H4 121.840
H3 B1 H4 116.319 H5 B2 H6 116.319
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability