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 HBHHBH (Diborane(4) C2V)

using model chemistry: QCISD(TQ)=FULL/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD(TQ)=FULL/6-31+G**
 hartrees
Energy at 0K-51.854416
Energy at 298.15K-51.857097
HF Energy-51.609514
Nuclear repulsion energy24.858670
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 QCISD(TQ)=FULL/6-31+G**
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 2878 2878        
2 A1 2185 2185        
3 A1 1368 1368        
4 A1 1144 1144        
5 A1 709 709        
6 A2 1380 1380        
7 A2 529 529        
8 B1 2190 2190        
9 B1 791 791        
10 B2 2835 2835        
11 B2 1443 1443        
12 B2 383 383        

Unscaled Zero Point Vibrational Energy (zpe) 8917.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8917.7 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 QCISD(TQ)=FULL/6-31+G**
ABC
6.87002 0.84471 0.81116

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(TQ)=FULL/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.735 -0.115
B2 0.000 -0.735 -0.115
H3 0.902 0.000 0.542
H4 -0.902 0.000 0.542
H5 0.000 1.897 0.035
H6 0.000 -1.897 0.035

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.46961.33611.33611.17202.6362
B21.46961.33611.33612.63621.1720
H31.33611.33611.80382.16072.1607
H41.33611.33611.80382.16072.1607
H51.17202.63622.16072.16073.7942
H62.63621.17202.16072.16073.7942

picture of Diborane(4) C2V state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
B1 B2 H3 56.635 B1 B2 H4 56.635
B1 B2 H6 172.610 B1 H3 B2 66.730
B1 H4 B2 66.730 B2 B1 H3 56.635
B2 B1 H4 56.635 B2 B1 H5 172.610
H3 B1 H4 84.915 H3 B1 H5 118.826
H3 B2 H4 84.915 H3 B2 H6 118.826
H4 B1 H5 118.826 H4 B2 H6 118.826
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability