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: M06-2X/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at M06-2X/6-31G(2df,p)
 hartrees
Energy at 0K-52.003054
Energy at 298.15K-52.005462
HF Energy-52.003054
Nuclear repulsion energy22.339039
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 M06-2X/6-31G(2df,p)
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 2641 2515 0.00      
2 A1 1227 1168 0.00      
3 A1 875 834 0.00      
4 B1 522 497 0.00      
5 B2 2620 2495 65.23      
6 B2 1160 1105 8.69      
7 E 2693 2565 71.98      
7 E 2693 2565 71.98      
8 E 1005 957 28.34      
8 E 1005 957 28.34      
9 E 392 373 4.73      
9 E 392 373 4.73      

Unscaled Zero Point Vibrational Energy (zpe) 8611.7 cm-1
Scaled (by 0.9524) Zero Point Vibrational Energy (zpe) 8201.7 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 M06-2X/6-31G(2df,p)
ABC
4.06923 0.66268 0.66268

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/6-31G(2df,p)

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.821
B2 0.000 0.000 -0.821
H3 0.000 1.014 1.453
H4 0.000 -1.014 1.453
H5 1.014 0.000 -1.453
H6 -1.014 0.000 -1.453

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.64271.19451.19452.49022.4902
B21.64272.49022.49021.19451.1945
H31.19452.49022.02743.24063.2406
H41.19452.49022.02743.24063.2406
H52.49021.19453.24063.24062.0274
H62.49021.19453.24063.24062.0274

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 121.932 B1 B2 H6 121.932
B2 B1 H3 121.932 B2 B1 H4 121.932
H3 B1 H4 116.136 H5 B2 H6 116.136
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B 0.007      
2 B 0.007      
3 H -0.004      
4 H -0.004      
5 H -0.004      
6 H -0.004      


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 -14.213 0.000 0.000
y 0.000 -14.213 0.000
z 0.000 0.000 -16.308
Traceless
 xyz
x 1.047 0.000 0.000
y 0.000 1.047 0.000
z 0.000 0.000 -2.094
Polar
3z2-r2-4.189
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 3.332 0.000 0.000
y 0.000 3.332 0.000
z 0.000 0.000 5.084


<r2> (average value of r2) Å2
<r2> 28.617
(<r2>)1/2 5.349