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

using model chemistry: mPW1PW91/aug-cc-pVDZ

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-pVDZ
 hartrees
Energy at 0K-52.017307
Energy at 298.15K-52.019705
HF Energy-52.017307
Nuclear repulsion energy22.250827
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-pVDZ
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 2574 2467 0.00      
2 A1 1184 1134 0.00      
3 A1 871 835 0.00      
4 B1 557 534 0.00      
5 B2 2552 2445 61.84      
6 B2 1114 1067 2.12      
7 E 2630 2520 78.26      
7 E 2630 2520 78.26      
8 E 980 939 22.77      
8 E 980 939 22.77      
9 E 379 363 3.33      
9 E 379 363 3.33      

Unscaled Zero Point Vibrational Energy (zpe) 8414.0 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 8063.1 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-pVDZ
ABC
3.99521 0.66221 0.66221

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVDZ

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.819
B2 0.000 0.000 -0.819
H3 0.000 1.023 1.460
H4 0.000 -1.023 1.460
H5 1.023 0.000 -1.460
H6 -1.023 0.000 -1.460

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.63741.20731.20732.49752.4975
B21.63742.49752.49751.20731.2073
H31.20732.49752.04613.25813.2581
H41.20732.49752.04613.25813.2581
H52.49751.20733.25813.25812.0461
H62.49751.20733.25813.25812.0461

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 122.066 B1 B2 H6 122.066
B2 B1 H3 122.066 B2 B1 H4 122.066
H3 B1 H4 115.867 H5 B2 H6 115.867
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -1.077      
2 B -1.077      
3 H 0.539      
4 H 0.539      
5 H 0.539      
6 H 0.539      


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 -14.664 0.000 0.000
y 0.000 -14.664 0.000
z 0.000 0.000 -16.540
Traceless
 xyz
x 0.938 0.000 0.000
y 0.000 0.938 0.000
z 0.000 0.000 -1.876
Polar
3z2-r2-3.751
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 4.233 0.000 0.000
y 0.000 4.233 0.000
z 0.000 0.000 6.071


<r2> (average value of r2) Å2
<r2> 28.961
(<r2>)1/2 5.382