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

using model chemistry: mPW1PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at mPW1PW91/6-311G*
 hartrees
Energy at 0K-52.022279
Energy at 298.15K-52.024685
HF Energy-52.022279
Nuclear repulsion energy22.352753
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 mPW1PW91/6-311G*
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 2567 2450 0.00      
2 A1 1195 1140 0.00      
3 A1 871 831 0.00      
4 B1 562 536 0.00      
5 B2 2545 2429 65.66      
6 B2 1126 1075 2.28      
7 E 2617 2498 83.25      
7 E 2617 2498 83.25      
8 E 979 935 25.82      
8 E 979 935 25.82      
9 E 387 369 2.50      
9 E 387 369 2.50      

Unscaled Zero Point Vibrational Energy (zpe) 8416.0 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 8032.2 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 mPW1PW91/6-311G*
ABC
4.05096 0.66741 0.66741

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311G*

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.815
B2 0.000 0.000 -0.815
H3 0.000 1.016 1.456
H4 0.000 -1.016 1.456
H5 1.016 0.000 -1.456
H6 -1.016 0.000 -1.456

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.63061.20101.20102.48792.4879
B21.63062.48792.48791.20101.2010
H31.20102.48792.03203.24663.2466
H41.20102.48792.03203.24663.2466
H52.48791.20103.24663.24662.0320
H62.48791.20103.24663.24662.0320

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 122.222 B1 B2 H6 122.222
B2 B1 H3 122.222 B2 B1 H4 122.222
H3 B1 H4 115.556 H5 B2 H6 115.556
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -0.179      
2 B -0.179      
3 H 0.089      
4 H 0.089      
5 H 0.089      
6 H 0.089      


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 -14.635 0.000 0.000
y 0.000 -14.635 0.000
z 0.000 0.000 -16.553
Traceless
 xyz
x 0.959 0.000 0.000
y 0.000 0.959 0.000
z 0.000 0.000 -1.918
Polar
3z2-r2-3.836
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 3.629 0.000 0.000
y 0.000 3.629 0.000
z 0.000 0.000 5.759


<r2> (average value of r2) Å2
<r2> 28.791
(<r2>)1/2 5.366