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

using model chemistry: B2PLYP/6-31G*

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/6-31G*
 hartrees
Energy at 0K-51.948104
Energy at 298.15K-51.950588
HF Energy-51.900064
Nuclear repulsion energy22.275996
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/6-31G*
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 2636 2502 0.00      
2 A1 1244 1181 0.00      
3 A1 877 833 0.00      
4 B1 539 512 0.00      
5 B2 2616 2483 75.58      
6 B2 1181 1121 8.98      
7 E 2686 2550 87.19      
7 E 2686 2550 87.19      
8 E 1017 965 29.41      
8 E 1017 965 29.41      
9 E 429 407 3.42      
9 E 429 407 3.42      

Unscaled Zero Point Vibrational Energy (zpe) 8678.6 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 8237.7 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 B2PLYP/6-31G*
ABC
4.05984 0.65864 0.65864

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.823
B2 0.000 0.000 -0.823
H3 0.000 1.015 1.460
H4 0.000 -1.015 1.460
H5 1.015 0.000 -1.460
H6 -1.015 0.000 -1.460

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.64671.19801.19802.49862.4986
B21.64672.49862.49861.19801.1980
H31.19802.49862.02983.25353.2535
H41.19802.49862.02983.25353.2535
H52.49861.19803.25353.25352.0298
H62.49861.19803.25353.25352.0298

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 122.096 B1 B2 H6 122.096
B2 B1 H3 122.096 B2 B1 H4 122.096
H3 B1 H4 115.808 H5 B2 H6 115.808
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B 0.003      
2 B 0.003      
3 H -0.001      
4 H -0.001      
5 H -0.001      
6 H -0.001      


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 -14.270 0.000 0.000
y 0.000 -14.270 0.000
z 0.000 0.000 -16.410
Traceless
 xyz
x 1.070 0.000 0.000
y 0.000 1.070 0.000
z 0.000 0.000 -2.140
Polar
3z2-r2-4.280
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 3.121 0.000 0.000
y 0.000 3.121 0.000
z 0.000 0.000 4.982


<r2> (average value of r2) Å2
<r2> 28.783
(<r2>)1/2 5.365