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

using model chemistry: CCSD(T)/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at CCSD(T)/6-31G(2df,p)
 hartrees
Energy at 0K-51.872121
Energy at 298.15K-51.874578
HF Energy-51.641160
Nuclear repulsion energy22.219176
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 CCSD(T)/6-31G(2df,p)
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 858 858        
2 B1 516 516        
3 E 2677 2677        
4 E 2676 2676        
5 E 2619 2619        
6 E 2600 2600        
7 E 1229 1229        
7 E 1171 1171        
8 E 1011 1011        
8 E 1011 1011        
9 E 420 420        
9 E 420 420        

Unscaled Zero Point Vibrational Energy (zpe) 8604.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8604.3 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 CCSD(T)/6-31G(2df,p)
ABC
4.05017 0.65339 0.65339

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31G(2df,p)

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 1.016 1.462
H4 0.000 -1.016 1.462
H5 1.016 0.000 -1.462
H6 -1.016 0.000 -1.462

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.65661.19741.19742.50532.5053
B21.65662.50532.50531.19741.1974
H31.19742.50532.03223.25753.2575
H41.19742.50532.03223.25753.2575
H52.50531.19743.25753.25752.0322
H62.50531.19743.25753.25752.0322

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 121.938 B1 B2 H6 121.938
B2 B1 H3 121.938 B2 B1 H4 121.938
H3 B1 H4 116.125 H5 B2 H6 116.125
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability