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

using model chemistry: PBEPBE/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 PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-51.928078
Energy at 298.15K-51.930365
HF Energy-51.928078
Nuclear repulsion energy22.295061
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 PBEPBE/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 2524 2498 0.00      
2 A1 1145 1133 0.00      
3 A1 872 863 0.00      
4 B1 583 577 0.00      
5 B2 2503 2478 40.39      
6 B2 1074 1062 0.09      
7 E 2570 2544 52.21      
7 E 2570 2544 52.21      
8 E 956 947 22.57      
8 E 956 947 22.57      
9 E 333 330 0.60      
9 E 333 330 0.60      

Unscaled Zero Point Vibrational Energy (zpe) 8210.0 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 8125.5 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 PBEPBE/6-31G(2df,p)
ABC
4.02486 0.66637 0.66637

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

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.813
B2 0.000 0.000 -0.813
H3 0.000 1.019 1.464
H4 0.000 -1.019 1.464
H5 1.019 0.000 -1.464
H6 -1.019 0.000 -1.464

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.62651.20931.20932.49502.4950
B21.62652.49502.49501.20931.2093
H31.20932.49502.03863.26363.2636
H41.20932.49502.03863.26363.2636
H52.49501.20933.26363.26362.0386
H62.49501.20933.26363.26362.0386

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 122.553 B1 B2 H6 122.553
B2 B1 H3 122.553 B2 B1 H4 122.553
H3 B1 H4 114.893 H5 B2 H6 114.893
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -0.043      
2 B -0.043      
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 -14.158 0.000 0.000
y 0.000 -14.158 0.000
z 0.000 0.000 -15.857
Traceless
 xyz
x 0.850 0.000 0.000
y 0.000 0.850 0.000
z 0.000 0.000 -1.699
Polar
3z2-r2-3.399
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 3.477 0.000 0.000
y 0.000 3.477 0.000
z 0.000 0.000 5.817


<r2> (average value of r2) Å2
<r2> 28.540
(<r2>)1/2 5.342