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 B2H4 (Diborane(4) D2d)

using model chemistry: QCISD/6-311G**

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/6-311G**
 hartrees
Energy at 0K-51.859404
Energy at 298.15K-51.861893
HF Energy-51.646263
Nuclear repulsion energy22.156108
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/6-311G**
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 2579 2460 0.00      
2 A1 1232 1176 0.00      
3 A1 855 816 0.00      
4 B1 509 485 0.00      
5 B2 2559 2441 82.74      
6 B2 1172 1118 17.83      
7 E 2631 2510 97.30      
7 E 2631 2510 97.30      
8 E 1010 964 23.89      
8 E 1010 964 23.89      
9 E 438 417 6.59      
9 E 438 417 6.59      

Unscaled Zero Point Vibrational Energy (zpe) 8531.2 cm-1
Scaled (by 0.9541) Zero Point Vibrational Energy (zpe) 8139.6 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/6-311G**
ABC
4.02309 0.64955 0.64955

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G**

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.831
B2 0.000 0.000 -0.831
H3 0.000 1.020 1.465
H4 0.000 -1.020 1.465
H5 1.020 0.000 -1.465
H6 -1.020 0.000 -1.465

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.66211.20041.20042.51212.5121
B21.66212.51212.51211.20041.2004
H31.20042.51212.03903.26523.2652
H41.20042.51212.03903.26523.2652
H52.51211.20043.26523.26522.0390
H62.51211.20043.26523.26522.0390

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 121.865 B1 B2 H6 121.865
B2 B1 H3 121.865 B2 B1 H4 121.865
H3 B1 H4 116.270 H5 B2 H6 116.270
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability