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

using model chemistry: CISD/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 CISD/3-21G
 hartrees
Energy at 0K-51.462736
Energy at 298.15K-51.465303
HF Energy-51.339397
Nuclear repulsion energy22.112026
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 CISD/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 2596 2444 0.00      
2 A1 1242 1169 0.00      
3 A1 878 826 0.00      
4 B1 546 513 0.00      
5 B2 2574 2423 67.46      
6 B2 1198 1128 9.88      
7 E 2648 2493 68.63      
7 E 2648 2493 68.63      
8 E 1018 958 28.53      
8 E 1018 958 28.53      
9 E 464 437 2.36      
9 E 464 437 2.36      

Unscaled Zero Point Vibrational Energy (zpe) 8646.6 cm-1
Scaled (by 0.9413) Zero Point Vibrational Energy (zpe) 8139.1 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 CISD/3-21G
ABC
3.98893 0.64946 0.64946

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/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 1.024 1.469
H4 0.000 -1.024 1.469
H5 1.024 0.000 -1.469
H6 -1.024 0.000 -1.469

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.65871.20731.20732.51612.5161
B21.65872.51612.51611.20731.2073
H31.20732.51612.04783.27543.2754
H41.20732.51612.04783.27543.2754
H52.51611.20733.27543.27542.0478
H62.51611.20733.27543.27542.0478

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 121.995 B1 B2 H6 121.995
B2 B1 H3 121.995 B2 B1 H4 121.995
H3 B1 H4 116.010 H5 B2 H6 116.010
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability