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=FULL/aug-cc-pVTZ

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=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-51.927072
Energy at 298.15K-51.929568
HF Energy-51.651752
Nuclear repulsion energy22.387837
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=FULL/aug-cc-pVTZ
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 2602 2474 0.00      
2 A1 1236 1176 0.00      
3 A1 872 829 0.00      
4 B1 533 507 0.00      
5 B2 2582 2455 76.98      
6 B2 1181 1123 11.58      
7 E 2654 2524 91.55      
7 E 2654 2524 91.55      
8 E 1011 961 25.91      
8 E 1011 961 25.91      
9 E 426 405 6.63      
9 E 426 405 6.63      

Unscaled Zero Point Vibrational Energy (zpe) 8592.9 cm-1
Scaled (by 0.951) Zero Point Vibrational Energy (zpe) 8171.8 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=FULL/aug-cc-pVTZ
ABC
4.09011 0.66506 0.66506

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/aug-cc-pVTZ

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.820
B2 0.000 0.000 -0.820
H3 0.000 1.011 1.450
H4 0.000 -1.011 1.450
H5 1.011 0.000 -1.450
H6 -1.011 0.000 -1.450

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.64061.19091.19092.48492.4849
B21.64062.48492.48491.19091.1909
H31.19092.48492.02233.23263.2326
H41.19092.48492.02233.23263.2326
H52.48491.19093.23263.23262.0223
H62.48491.19093.23263.23262.0223

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 121.895 B1 B2 H6 121.895
B2 B1 H3 121.895 B2 B1 H4 121.895
H3 B1 H4 116.210 H5 B2 H6 116.210
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability