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

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-51.803259
Energy at 298.15K-51.805789
HF Energy-51.634432
Nuclear repulsion energy22.201380
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 MP3/6-31G*
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 2646 2484 0.00      
2 A1 1257 1180 0.00      
3 A1 882 828 0.00      
4 B1 524 492 0.00      
5 B2 2627 2465 78.09      
6 B2 1197 1124 12.84      
7 E 2704 2538 82.97      
7 E 2704 2538 82.97      
8 E 1027 964 25.77      
8 E 1027 964 25.77      
9 E 457 429 4.30      
9 E 457 429 4.30      

Unscaled Zero Point Vibrational Energy (zpe) 8754.8 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 8217.2 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 MP3/6-31G*
ABC
4.03777 0.65319 0.65319

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

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 1.018 1.464
H4 0.000 -1.018 1.464
H5 1.018 0.000 -1.464
H6 -1.018 0.000 -1.464

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.65541.20001.20002.50722.5072
B21.65542.50722.50721.20001.2000
H31.20002.50722.03533.26193.2619
H41.20002.50722.03533.26193.2619
H52.50721.20003.26193.26192.0353
H62.50721.20003.26193.26192.0353

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 122.001 B1 B2 H6 122.001
B2 B1 H3 122.001 B2 B1 H4 122.001
H3 B1 H4 115.998 H5 B2 H6 115.998
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability