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

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/aug-cc-pVTZ
 hartrees
Energy at 0K-51.942975
Energy at 298.15K-51.945264
HF Energy-51.942975
Nuclear repulsion energy22.375455
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 PBEPBEultrafine/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 2509 2480 0.00      
2 A1 1140 1127 0.00      
3 A1 869 859 0.00      
4 B1 590 584 0.00      
5 B2 2489 2461 42.36      
6 B2 1069 1058 0.19      
7 E 2553 2524 59.46      
7 E 2553 2524 59.46      
8 E 947 936 19.90      
8 E 947 936 19.90      
9 E 330 326 1.38      
9 E 330 326 1.38      

Unscaled Zero Point Vibrational Energy (zpe) 8162.4 cm-1
Scaled (by 0.9888) Zero Point Vibrational Energy (zpe) 8071.0 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 PBEPBEultrafine/aug-cc-pVTZ
ABC
4.03095 0.67271 0.67271

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

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.809
B2 0.000 0.000 -0.809
H3 0.000 1.019 1.457
H4 0.000 -1.019 1.457
H5 1.019 0.000 -1.457
H6 -1.019 0.000 -1.457

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.61821.20691.20692.48422.4842
B21.61822.48422.48421.20691.2069
H31.20692.48422.03713.25003.2500
H41.20692.48422.03713.25003.2500
H52.48421.20693.25003.25002.0371
H62.48421.20693.25003.25002.0371

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 122.447 B1 B2 H6 122.447
B2 B1 H3 122.447 B2 B1 H4 122.447
H3 B1 H4 115.106 H5 B2 H6 115.106
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -0.032      
2 B -0.032      
3 H 0.016      
4 H 0.016      
5 H 0.016      
6 H 0.016      


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 -14.775 0.000 0.000
y 0.000 -14.775 0.000
z 0.000 0.000 -16.449
Traceless
 xyz
x 0.837 0.000 0.000
y 0.000 0.837 0.000
z 0.000 0.000 -1.675
Polar
3z2-r2-3.350
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 4.408 0.000 0.000
y 0.000 4.408 0.000
z 0.000 0.000 6.680


<r2> (average value of r2) Å2
<r2> 28.760
(<r2>)1/2 5.363