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All results from a given calculation for HBHHBH (Diborane(4) C2V)

using model chemistry: MP2/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/CEP-31G*
 hartrees
Energy at 0K-7.754578
Energy at 298.15K-7.757449
HF Energy-7.598602
Nuclear repulsion energy13.059451
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 MP2/CEP-31G*
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 2890 2744 0.62      
2 A1 2055 1951 50.33      
3 A1 1386 1316 0.02      
4 A1 1164 1105 3.85      
5 A1 744 706 7.39      
6 A2 1345 1277 0.00      
7 A2 645 612 0.00      
8 B1 2112 2005 106.10      
9 B1 818 777 0.14      
10 B2 2845 2701 38.03      
11 B2 1412 1341 255.54      
12 B2 506 480 47.61      

Unscaled Zero Point Vibrational Energy (zpe) 8960.7 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 8507.3 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 MP2/CEP-31G*
ABC
6.63481 0.80325 0.77347

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.758 -0.119
B2 0.000 -0.758 -0.119
H3 0.911 0.000 0.559
H4 -0.911 0.000 0.559
H5 0.000 1.927 0.036
H6 0.000 -1.927 0.036

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.51521.36541.36541.17922.6887
B21.51521.36541.36542.68871.1792
H31.36541.36541.82282.19472.1947
H41.36541.36541.82282.19472.1947
H51.17922.68872.19472.19473.8534
H62.68871.17922.19472.19473.8534

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 56.298 B1 B2 H4 56.298
B1 B2 H6 172.468 B1 H3 B2 67.404
B1 H4 B2 67.404 B2 B1 H3 56.298
B2 B1 H4 56.298 B2 B1 H5 172.468
H3 B1 H4 83.750 H3 B1 H5 119.013
H3 B2 H4 83.750 H3 B2 H6 119.013
H4 B1 H5 119.013 H4 B2 H6 119.013
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability