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

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

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-pVDZ
 hartrees
Energy at 0K-51.849157
Energy at 298.15K-51.851981
HF Energy-51.608740
Nuclear repulsion energy24.392559
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-pVDZ
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 2802 2740        
2 A1 2079 2033        
3 A1 1321 1292        
4 A1 1101 1077        
5 A1 712 697        
6 A2 1287 1259        
7 A2 625 611        
8 B1 2078 2032        
9 B1 789 771        
10 B2 2762 2700        
11 B2 1358 1327        
12 B2 482 471        

Unscaled Zero Point Vibrational Energy (zpe) 8697.8 cm-1
Scaled (by 0.9778) Zero Point Vibrational Energy (zpe) 8504.7 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(T)/aug-cc-pVDZ
ABC
6.56570 0.81251 0.78357

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.749 -0.119
B2 0.000 -0.749 -0.119
H3 0.909 0.000 0.575
H4 -0.909 0.000 0.575
H5 0.000 1.928 0.019
H6 0.000 -1.928 0.019

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.49801.36721.36721.18722.6807
B21.49801.36721.36722.68071.1872
H31.36721.36721.81882.20322.2032
H41.36721.36721.81882.20322.2032
H51.18722.68072.20322.20323.8564
H62.68071.18722.20322.20323.8564

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 56.782 B1 B2 H4 56.782
B1 B2 H6 173.334 B1 H3 B2 66.437
B1 H4 B2 66.437 B2 B1 H3 56.782
B2 B1 H4 56.782 B2 B1 H5 173.334
H3 B1 H4 83.387 H3 B1 H5 119.027
H3 B2 H4 83.387 H3 B2 H6 119.027
H4 B1 H5 119.027 H4 B2 H6 119.027
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability