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

using model chemistry: MP2/6-31G

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
 hartrees
Energy at 0K-51.715913
Energy at 298.15K-51.718500
HF Energy-51.614386
Nuclear repulsion energy22.110298
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
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 2614 2501 0.00      
2 A1 1261 1206 0.00      
3 A1 880 842 0.00      
4 B1 541 518 0.00      
5 B2 2592 2480 96.05      
6 B2 1213 1161 14.27      
7 E 2669 2554 104.79      
7 E 2669 2554 104.79      
8 E 1037 992 30.98      
8 E 1037 992 30.98      
9 E 476 455 4.95      
9 E 476 455 4.95      

Unscaled Zero Point Vibrational Energy (zpe) 8732.6 cm-1
Scaled (by 0.9568) Zero Point Vibrational Energy (zpe) 8355.4 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
ABC
4.01200 0.64714 0.64714

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.832
B2 0.000 0.000 -0.832
H3 0.000 1.021 1.470
H4 0.000 -1.021 1.470
H5 1.021 0.000 -1.470
H6 -1.021 0.000 -1.470

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.66391.20381.20382.51802.5180
B21.66392.51802.51801.20381.2038
H31.20382.51802.04193.27513.2751
H41.20382.51802.04193.27513.2751
H52.51801.20383.27513.27512.0419
H62.51801.20383.27513.27512.0419

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 121.998 B1 B2 H6 121.998
B2 B1 H3 121.998 B2 B1 H4 121.998
H3 B1 H4 116.004 H5 B2 H6 116.004
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability