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: BLYP/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at BLYP/6-31G**
 hartrees
Energy at 0K-51.993005
Energy at 298.15K-51.995381
HF Energy-51.993005
Nuclear repulsion energy22.265416
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 BLYP/6-31G**
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 2534 2514 0.00      
2 A1 1179 1170 0.00      
3 A1 867 860 0.00      
4 B1 565 560 0.00      
5 B2 2513 2494 55.22      
6 B2 1112 1104 0.72      
7 E 2573 2553 72.65      
7 E 2573 2553 72.65      
8 E 977 970 25.62      
8 E 977 970 25.62      
9 E 376 373 1.21      
9 E 376 373 1.21      

Unscaled Zero Point Vibrational Energy (zpe) 8310.7 cm-1
Scaled (by 0.9923) Zero Point Vibrational Energy (zpe) 8246.7 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 BLYP/6-31G**
ABC
4.03716 0.66202 0.66202

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/6-31G**

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.818
B2 0.000 0.000 -0.818
H3 0.000 1.018 1.465
H4 0.000 -1.018 1.465
H5 1.018 0.000 -1.465
H6 -1.018 0.000 -1.465

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.63521.20641.20642.49962.4996
B21.63522.49962.49961.20641.2064
H31.20642.49962.03553.26513.2651
H41.20642.49962.03553.26513.2651
H52.49961.20643.26513.26512.0355
H62.49961.20643.26513.26512.0355

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 122.475 B1 B2 H6 122.475
B2 B1 H3 122.475 B2 B1 H4 122.475
H3 B1 H4 115.049 H5 B2 H6 115.049
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B 0.059      
2 B 0.059      
3 H -0.030      
4 H -0.030      
5 H -0.030      
6 H -0.030      


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 -14.183 0.000 0.000
y 0.000 -14.183 0.000
z 0.000 0.000 -16.008
Traceless
 xyz
x 0.913 0.000 0.000
y 0.000 0.913 0.000
z 0.000 0.000 -1.825
Polar
3z2-r2-3.651
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 3.252 0.000 0.000
y 0.000 3.252 0.000
z 0.000 0.000 5.569


<r2> (average value of r2) Å2
<r2> 28.656
(<r2>)1/2 5.353