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

using model chemistry: MP2/STO-3G

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/STO-3G
 hartrees
Energy at 0K-51.074387
Energy at 298.15K-51.077026
HF Energy-51.010140
Nuclear repulsion energy22.476398
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/STO-3G
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 3033 2644 0.00      
2 A1 1450 1264 0.00      
3 A1 979 854 0.00      
4 B1 550 480 0.00      
5 B2 3019 2632 2.19      
6 B2 1392 1214 40.42      
7 E 3158 2753 4.16      
7 E 3158 2753 4.16      
8 E 1134 989 56.92      
8 E 1134 989 56.92      
9 E 583 508 7.24      
9 E 583 508 7.24      

Unscaled Zero Point Vibrational Energy (zpe) 10086.2 cm-1
Scaled (by 0.8719) Zero Point Vibrational Energy (zpe) 8794.1 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 MP2/STO-3G
ABC
4.15662 0.66479 0.66479

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/STO-3G

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.825
B2 0.000 0.000 -0.825
H3 0.000 1.003 1.440
H4 0.000 -1.003 1.440
H5 1.003 0.000 -1.440
H6 -1.003 0.000 -1.440

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.64921.17671.17672.47672.4767
B21.64922.47672.47671.17671.1767
H31.17672.47672.00603.21013.2101
H41.17672.47672.00603.21013.2101
H52.47671.17673.21013.21012.0060
H62.47671.17673.21013.21012.0060

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 121.524 B1 B2 H6 121.524
B2 B1 H3 121.524 B2 B1 H4 121.524
H3 B1 H4 116.951 H5 B2 H6 116.951
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability