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: B2PLYP=FULL/aug-cc-pCVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at B2PLYP=FULL/aug-cc-pCVTZ
 hartrees
Energy at 0K-52.013053
Energy at 298.15K 
HF Energy-51.919242
Nuclear repulsion energy22.408412
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 B2PLYP=FULL/aug-cc-pCVTZ
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 2599 2599 0.00      
2 A1 1220 1220 0.00      
3 A1 868 868 0.00      
4 B1 552 552 0.00      
5 B2 2580 2580 68.32      
6 B2 1158 1158 5.65      
7 E 2647 2647 85.95      
7 E 2647 2647 85.94      
8 E 1006 1006 26.57      
8 E 1006 1006 26.57      
9 E 405 405 5.12      
9 E 405 405 5.12      

Unscaled Zero Point Vibrational Energy (zpe) 8545.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8545.0 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 B2PLYP=FULL/aug-cc-pCVTZ
ABC
4.08170 0.66820 0.66820

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/aug-cc-pCVTZ

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.817
B2 0.000 0.000 -0.817
H3 0.000 1.012 1.449
H4 0.000 -1.012 1.449
H5 1.012 0.000 -1.449
H6 -1.012 0.000 -1.449

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.63431.19301.19302.48162.4816
B21.63432.48162.48161.19301.1930
H31.19302.48162.02433.23173.2317
H41.19302.48162.02433.23173.2317
H52.48161.19303.23173.23172.0243
H62.48161.19303.23173.23172.0243

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 121.962 B1 B2 H6 121.962
B2 B1 H3 121.962 B2 B1 H4 121.962
H3 B1 H4 116.077 H5 B2 H6 116.077
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability