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: B2PLYP/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at B2PLYP/3-21G*
 hartrees
Energy at 0K-51.641913
Energy at 298.15K-51.644449
HF Energy-51.607370
Nuclear repulsion energy22.307127
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 B2PLYP/3-21G*
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 2627 2627 0.00      
2 A1 1235 1235 0.00      
3 A1 894 894 0.00      
4 B1 565 565 0.00      
5 B2 2607 2607 58.31      
6 B2 1187 1187 3.90      
7 E 2679 2679 64.26      
7 E 2679 2679 64.26      
8 E 1010 1010 30.89      
8 E 1010 1010 30.89      
9 E 443 443 1.07      
9 E 443 443 1.07      

Unscaled Zero Point Vibrational Energy (zpe) 8688.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8688.9 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 B2PLYP/3-21G*
ABC
4.04512 0.66297 0.66297

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/3-21G*

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.819
B2 0.000 0.000 -0.819
H3 0.000 1.017 1.457
H4 0.000 -1.017 1.457
H5 1.017 0.000 -1.457
H6 -1.017 0.000 -1.457

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.63881.20021.20022.49332.4933
B21.63882.49332.49331.20021.2002
H31.20022.49332.03353.24983.2498
H41.20022.49332.03353.24983.2498
H52.49331.20023.24983.24982.0335
H62.49331.20023.24983.24982.0335

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 122.100 B1 B2 H6 122.100
B2 B1 H3 122.100 B2 B1 H4 122.100
H3 B1 H4 115.801 H5 B2 H6 115.801
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -0.044      
2 B -0.044      
3 H 0.022      
4 H 0.022      
5 H 0.022      
6 H 0.022      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.902 0.000 0.000
y 0.000 -14.902 0.000
z 0.000 0.000 -16.639
Traceless
 xyz
x 0.868 0.000 0.000
y 0.000 0.868 0.000
z 0.000 0.000 -1.737
Polar
3z2-r2-3.473
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.037 0.000 0.000
y 0.000 3.037 0.000
z 0.000 0.000 5.010


<r2> (average value of r2) Å2
<r2> 29.012
(<r2>)1/2 5.386