return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: mPW1PW91/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at mPW1PW91/6-311G**
 hartrees
Energy at 0K-52.026872
Energy at 298.15K-52.029273
HF Energy-52.026872
Nuclear repulsion energy22.382068
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 mPW1PW91/6-311G**
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 2462 0.00      
2 A1 1191 1139 0.00      
3 A1 870 832 0.00      
4 B1 565 540 0.00      
5 B2 2552 2441 60.47      
6 B2 1124 1075 1.67      
7 E 2624 2511 77.73      
7 E 2624 2511 77.73      
8 E 983 941 24.52      
8 E 983 941 24.52      
9 E 379 362 2.22      
9 E 379 362 2.22      

Unscaled Zero Point Vibrational Energy (zpe) 8423.3 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 8058.6 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 mPW1PW91/6-311G**
ABC
4.05002 0.66930 0.66930

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311G**

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.815
B2 0.000 0.000 -0.815
H3 0.000 1.016 1.451
H4 0.000 -1.016 1.451
H5 1.016 0.000 -1.451
H6 -1.016 0.000 -1.451

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.62951.19901.19902.48332.4833
B21.62952.48332.48331.19901.1990
H31.19902.48332.03233.23863.2386
H41.19902.48332.03233.23863.2386
H52.48331.19903.23863.23862.0323
H62.48331.19903.23863.23862.0323

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 122.060 B1 B2 H6 122.060
B2 B1 H3 122.060 B2 B1 H4 122.060
H3 B1 H4 115.880 H5 B2 H6 115.880
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -0.039      
2 B -0.039      
3 H 0.020      
4 H 0.020      
5 H 0.020      
6 H 0.020      


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 -14.591 0.000 0.000
y 0.000 -14.591 0.000
z 0.000 0.000 -16.489
Traceless
 xyz
x 0.949 0.000 0.000
y 0.000 0.949 0.000
z 0.000 0.000 -1.898
Polar
3z2-r2-3.797
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 3.677 0.000 0.000
y 0.000 3.677 0.000
z 0.000 0.000 5.797


<r2> (average value of r2) Å2
<r2> 28.700
(<r2>)1/2 5.357