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

using model chemistry: HF/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 HF/3-21G*
 hartrees
Energy at 0K-51.339739
Energy at 298.15K-51.342371
HF Energy-51.339739
Nuclear repulsion energy22.223213
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 HF/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 2699 2436 0.00      
2 A1 1308 1181 0.00      
3 A1 891 804 0.00      
4 B1 518 468 0.00      
5 B2 2675 2414 108.42      
6 B2 1262 1139 22.57      
7 E 2745 2478 103.65      
7 E 2745 2478 103.65      
8 E 1061 958 42.18      
8 E 1061 958 42.18      
9 E 504 455 6.34      
9 E 504 455 6.34      

Unscaled Zero Point Vibrational Energy (zpe) 8986.7 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 8111.4 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 HF/3-21G*
ABC
4.06258 0.65165 0.65165

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

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.831
B2 0.000 0.000 -0.831
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
B11.66191.19371.19372.50542.5054
B21.66192.50542.50541.19371.1937
H31.19372.50542.02913.25333.2533
H41.19372.50542.02913.25333.2533
H52.50541.19373.25333.25332.0291
H62.50541.19373.25333.25332.0291

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 121.797 B1 B2 H6 121.797
B2 B1 H3 121.797 B2 B1 H4 121.797
H3 B1 H4 116.405 H5 B2 H6 116.405
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B 0.034      
2 B 0.034      
3 H -0.017      
4 H -0.017      
5 H -0.017      
6 H -0.017      


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 -15.162 0.000 0.000
y 0.000 -15.162 0.000
z 0.000 0.000 -17.408
Traceless
 xyz
x 1.123 0.000 0.000
y 0.000 1.123 0.000
z 0.000 0.000 -2.246
Polar
3z2-r2-4.491
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 2.979 0.000 0.000
y 0.000 2.979 0.000
z 0.000 0.000 4.551


<r2> (average value of r2) Å2
<r2> 29.484
(<r2>)1/2 5.430