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All results from a given calculation for B2H4 (Diborane(4) D2d)

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 D2D 1A1
Energy calculated at QCISD(T)/aug-cc-pVDZ
 hartrees
Energy at 0K-51.852440
Energy at 298.15K-51.854873
HF Energy-51.637887
Nuclear repulsion energy21.960115
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 850 831        
2 B1 501 490        
3 E 2610 2552        
4 E 2609 2551        
5 E 2558 2501        
6 E 2537 2481        
7 E 1209 1183        
7 E 1145 1120        
8 E 992 970        
8 E 992 970        
9 E 416 407        
9 E 414 405        

Unscaled Zero Point Vibrational Energy (zpe) 8416.1 cm-1
Scaled (by 0.9778) Zero Point Vibrational Energy (zpe) 8229.2 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
3.94197 0.63918 0.63918

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

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.837
B2 0.000 0.000 -0.837
H3 0.000 1.030 1.478
H4 0.000 -1.030 1.478
H5 1.030 0.000 -1.478
H6 -1.030 0.000 -1.478

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.67451.21271.21272.53362.5336
B21.67452.53362.53361.21271.2127
H31.21272.53362.05993.29453.2945
H41.21272.53362.05993.29453.2945
H52.53361.21273.29453.29452.0599
H62.53361.21273.29453.29452.0599

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 121.866 B1 B2 H6 121.866
B2 B1 H3 121.866 B2 B1 H4 121.866
H3 B1 H4 116.268 H5 B2 H6 116.268
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability