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

using model chemistry: mPW1PW91/aug-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 mPW1PW91/aug-cc-pVTZ
 hartrees
Energy at 0K-52.032165
Energy at 298.15K-52.034579
HF Energy-52.032165
Nuclear repulsion energy22.401493
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/aug-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 2577 2469 0.00      
2 A1 1193 1143 0.00      
3 A1 871 834 0.00      
4 B1 567 544 0.00      
5 B2 2557 2450 58.02      
6 B2 1128 1080 1.70      
7 E 2627 2517 74.06      
7 E 2627 2517 74.06      
8 E 984 943 24.57      
8 E 984 943 24.57      
9 E 382 366 3.11      
9 E 382 366 3.11      

Unscaled Zero Point Vibrational Energy (zpe) 8438.5 cm-1
Scaled (by 0.9581) Zero Point Vibrational Energy (zpe) 8084.9 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/aug-cc-pVTZ
ABC
4.06105 0.67032 0.67032

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-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 1.451
H4 0.000 -1.015 1.451
H5 1.015 0.000 -1.451
H6 -1.015 0.000 -1.451

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.62811.19791.19792.48162.4816
B21.62812.48162.48161.19791.1979
H31.19792.48162.02953.23673.2367
H41.19792.48162.02953.23673.2367
H52.48161.19793.23673.23672.0295
H62.48161.19793.23673.23672.0295

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 122.099 B1 B2 H6 122.099
B2 B1 H3 122.099 B2 B1 H4 122.099
H3 B1 H4 115.801 H5 B2 H6 115.801
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -0.087      
2 B -0.087      
3 H 0.044      
4 H 0.044      
5 H 0.044      
6 H 0.044      


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 -14.578 0.000 0.000
y 0.000 -14.578 0.000
z 0.000 0.000 -16.486
Traceless
 xyz
x 0.954 0.000 0.000
y 0.000 0.954 0.000
z 0.000 0.000 -1.908
Polar
3z2-r2-3.816
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 4.182 0.000 0.000
y 0.000 4.182 0.000
z 0.000 0.000 6.007


<r2> (average value of r2) Å2
<r2> 28.664
(<r2>)1/2 5.354