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

using model chemistry: B3PW91/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at B3PW91/cc-pVTZ
 hartrees
Energy at 0K-52.029694
Energy at 298.15K-52.032104
HF Energy-52.029694
Nuclear repulsion energy22.397034
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 B3PW91/cc-pVTZ
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 2468 0.00      
2 A1 1188 1142 0.00      
3 A1 870 837 0.00      
4 B1 570 548 0.00      
5 B2 2546 2449 57.06      
6 B2 1122 1079 1.20      
7 E 2615 2514 72.09      
7 E 2615 2514 72.09      
8 E 981 944 25.00      
8 E 981 944 25.00      
9 E 380 366 2.68      
9 E 380 366 2.68      

Unscaled Zero Point Vibrational Energy (zpe) 8407.8 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 8085.0 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 B3PW91/cc-pVTZ
ABC
4.05957 0.67041 0.67041

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVTZ

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.814
B2 0.000 0.000 -0.814
H3 0.000 1.015 1.452
H4 0.000 -1.015 1.452
H5 1.015 0.000 -1.452
H6 -1.015 0.000 -1.452

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.62711.19891.19892.48232.4823
B21.62712.48232.48231.19891.1989
H31.19892.48232.02993.23893.2389
H41.19892.48232.02993.23893.2389
H52.48231.19893.23893.23892.0299
H62.48231.19893.23893.23892.0299

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 122.163 B1 B2 H6 122.163
B2 B1 H3 122.163 B2 B1 H4 122.163
H3 B1 H4 115.673 H5 B2 H6 115.673
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -0.095      
2 B -0.095      
3 H 0.047      
4 H 0.047      
5 H 0.047      
6 H 0.047      


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 -14.565 0.000 0.000
y 0.000 -14.565 0.000
z 0.000 0.000 -16.471
Traceless
 xyz
x 0.953 0.000 0.000
y 0.000 0.953 0.000
z 0.000 0.000 -1.906
Polar
3z2-r2-3.812
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 3.921 0.000 0.000
y 0.000 3.921 0.000
z 0.000 0.000 5.984


<r2> (average value of r2) Å2
<r2> 28.663
(<r2>)1/2 5.354