return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: CCSD(T)=FULL/Def2TZVPP

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)=FULL/Def2TZVPP
 hartrees
Energy at 0K-51.935506
Energy at 298.15K-51.937974
HF Energy-51.652686
Nuclear repulsion energy22.321234
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)=FULL/Def2TZVPP
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 862 862        
2 B1 529 529        
3 E 2646 2646        
4 E 2646 2646        
5 E 2597 2597        
6 E 2577 2577        
7 E 1230 1230        
7 E 1170 1170        
8 E 1008 1008        
8 E 1008 1008        
9 E 420 420        
9 E 420 420        

Unscaled Zero Point Vibrational Energy (zpe) 8556.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8556.2 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 CCSD(T)=FULL/Def2TZVPP
ABC
4.07128 0.66068 0.66068

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/Def2TZVPP

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.823
B2 0.000 0.000 -0.823
H3 0.000 1.013 1.454
H4 0.000 -1.013 1.454
H5 1.013 0.000 -1.454
H6 -1.013 0.000 -1.454

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.64651.19371.19372.49252.4925
B21.64652.49252.49251.19371.1937
H31.19372.49252.02693.24193.2419
H41.19372.49252.02693.24193.2419
H52.49251.19373.24193.24192.0269
H62.49251.19373.24193.24192.0269

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 121.894 B1 B2 H6 121.894
B2 B1 H3 121.894 B2 B1 H4 121.894
H3 B1 H4 116.211 H5 B2 H6 116.211
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability