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

using model chemistry: QCISD(T)/aug-cc-pVTZ

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(T)/aug-cc-pVTZ
 hartrees
Energy at 0K-51.901584
Energy at 298.15K-51.904487
HF Energy-51.625924
Nuclear repulsion energy24.773886
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(T)/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 2824 2731        
2 A1 2116 2045        
3 A1 1341 1297        
4 A1 1105 1068        
5 A1 726 702        
6 A2 1327 1283        
7 A2 669 646        
8 B1 2112 2042        
9 B1 797 771        
10 B2 2785 2693        
11 B2 1390 1344        
12 B2 537 519        

Unscaled Zero Point Vibrational Energy (zpe) 8864.9 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 8570.6 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(T)/aug-cc-pVTZ
ABC
6.74508 0.84039 0.80976

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/aug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.735 -0.116
B2 0.000 -0.735 -0.116
H3 0.899 0.000 0.566
H4 -0.899 0.000 0.566
H5 0.000 1.902 0.016
H6 0.000 -1.902 0.016

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.47021.34691.34691.17432.6403
B21.47021.34691.34692.64031.1743
H31.34691.34691.79802.17432.1743
H41.34691.34691.79802.17432.1743
H51.17432.64032.17432.17433.8038
H62.64031.17432.17432.17433.8038

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 56.922 B1 B2 H4 56.922
B1 B2 H6 173.516 B1 H3 B2 66.155
B1 H4 B2 66.155 B2 B1 H3 56.922
B2 B1 H4 56.922 B2 B1 H5 173.516
H3 B1 H4 83.743 H3 B1 H5 119.017
H3 B2 H4 83.743 H3 B2 H6 119.017
H4 B1 H5 119.017 H4 B2 H6 119.017
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability