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 B2H6 (Diborane)

using model chemistry: PBEPBE/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at PBEPBE/6-31G**
 hartrees
Energy at 0K-53.171396
Energy at 298.15K-53.177146
HF Energy-53.171396
Nuclear repulsion energy31.920416
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 PBEPBE/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 Ag 2582 2547 0.00 219.77 0.12 0.22
2 Ag 2161 2131 0.00 75.50 0.09 0.16
3 Ag 1160 1144 0.00 16.01 0.71 0.83
4 Ag 797 786 0.00 16.12 0.22 0.36
5 Au 829 818 0.00 0.00 0.00 0.00
6 B1g 2662 2625 0.00 108.58 0.75 0.86
7 B1g 913 900 0.00 2.30 0.75 0.86
8 B1u 2012 1984 7.00 0.00 0.00 0.00
9 B1u 960 947 15.64 0.00 0.75 0.86
10 B2g 1846 1820 0.00 4.25 0.75 0.86
11 B2g 877 865 0.00 4.18 0.75 0.86
12 B2u 2675 2639 148.25 0.00 0.00 0.00
13 B2u 879 867 0.02 0.00 0.75 0.86
14 B2u 305 300 15.35 0.00 0.00 0.00
15 B3g 957 943 0.00 33.41 0.75 0.86
16 B3u 2570 2535 132.99 0.00 0.00 0.00
17 B3u 1678 1655 337.32 0.00 0.00 0.00
18 B3u 1157 1141 54.27 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 13508.2 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 13323.1 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 PBEPBE/6-31G**
ABC
2.63816 0.60710 0.55756

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.882 0.000 0.000
B2 -0.882 0.000 0.000
H3 0.000 0.000 0.986
H4 0.000 0.000 -0.986
H5 1.466 1.048 0.000
H6 1.466 -1.048 0.000
H7 -1.466 1.048 0.000
H8 -1.466 -1.048 0.000

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6 H7 H8
B11.76491.32361.32361.19941.19942.57142.5714
B21.76491.32361.32362.57142.57141.19941.1994
H31.32361.32361.97292.05422.05422.05422.0542
H41.32361.32361.97292.05422.05422.05422.0542
H51.19942.57142.05422.05422.09622.93133.6037
H61.19942.57142.05422.05422.09623.60372.9313
H72.57141.19942.05422.05422.93133.60372.0962
H82.57141.19942.05422.05423.60372.93132.0962

picture of Diborane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
B1 H3 B2 83.630 B1 H4 B2 83.630
H3 B1 H4 96.370 H3 B1 H5 108.916
H3 B1 H6 108.916 H3 B2 H4 96.370
H3 B2 H7 108.916 H3 B2 H8 108.916
H4 B1 H5 108.916 H4 B1 H6 108.916
H4 B2 H7 108.916 H4 B2 H8 108.916
H5 B1 H6 121.814 H7 B2 H8 121.814
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -0.082      
2 B -0.082      
3 H 0.085      
4 H 0.085      
5 H -0.002      
6 H -0.002      
7 H -0.002      
8 H -0.002      


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 -18.474 0.000 0.000
y 0.000 -17.368 0.000
z 0.000 0.000 -14.544
Traceless
 xyz
x -2.518 0.000 0.000
y 0.000 -0.859 0.000
z 0.000 0.000 3.377
Polar
3z2-r26.753
x2-y2-1.106
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.573 0.000 0.000
y 0.000 4.120 0.000
z 0.000 0.000 3.236


<r2> (average value of r2) Å2
<r2> 33.210
(<r2>)1/2 5.763