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

using model chemistry: MP4=FULL/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at MP4=FULL/3-21G
 hartrees
Energy at 0K-51.471271
Energy at 298.15K-51.473826
HF Energy-51.339287
Nuclear repulsion energy22.091687
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=FULL/3-21G
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 875 856        
2 B1 552 540        
3 E 2636 2580        
4 E 2636 2580        
5 E 2579 2524        
6 E 2560 2506        
7 E 1233 1206        
7 E 1190 1164        
8 E 1013 991        
8 E 1013 991        
9 E 457 447        
9 E 457 447        

Unscaled Zero Point Vibrational Energy (zpe) 8598.6 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 8416.3 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 MP4=FULL/3-21G
ABC
3.97859 0.64884 0.64884

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/3-21G

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.829
B2 0.000 0.000 -0.829
H3 0.000 1.025 1.471
H4 0.000 -1.025 1.471
H5 1.025 0.000 -1.471
H6 -1.025 0.000 -1.471

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.65861.20931.20932.51812.5181
B21.65862.51812.51811.20931.2093
H31.20932.51812.05043.27923.2792
H41.20932.51812.05043.27923.2792
H52.51811.20933.27923.27922.0504
H62.51811.20933.27923.27922.0504

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 122.029 B1 B2 H6 122.029
B2 B1 H3 122.029 B2 B1 H4 122.029
H3 B1 H4 115.942 H5 B2 H6 115.942
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability