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/3-21G*

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/3-21G*
 hartrees
Energy at 0K-52.861815
Energy at 298.15K-52.867618
HF Energy-52.861815
Nuclear repulsion energy31.866797
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/3-21G*
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 2610 2489 0.00 210.08 0.11 0.19
2 Ag 2141 2041 0.00 88.58 0.09 0.17
3 Ag 1156 1103 0.00 15.51 0.74 0.85
4 Ag 796 759 0.00 17.17 0.24 0.38
5 Au 864 823 0.00 0.00 0.00 0.00
6 B1g 2700 2575 0.00 92.36 0.75 0.86
7 B1g 886 845 0.00 1.60 0.75 0.86
8 B1u 1960 1869 7.04 0.00 0.00 0.00
9 B1u 969 924 7.14 0.00 0.00 0.00
10 B2g 1833 1748 0.00 4.36 0.75 0.86
11 B2g 881 840 0.00 2.70 0.75 0.86
12 B2u 2714 2588 112.85 0.00 0.00 0.00
13 B2u 887 846 0.08 0.00 0.00 0.00
14 B2u 331 315 11.64 0.00 0.00 0.00
15 B3g 1034 986 0.00 36.27 0.75 0.86
16 B3u 2600 2479 103.87 0.00 0.00 0.00
17 B3u 1669 1592 350.00 0.00 0.00 0.00
18 B3u 1162 1108 52.40 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 13597.2 cm-1
Scaled (by 0.9535) Zero Point Vibrational Energy (zpe) 12964.9 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/3-21G*
ABC
2.62057 0.60556 0.55616

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/3-21G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.885 0.000 0.000
B2 -0.885 0.000 0.000
H3 0.000 0.000 0.991
H4 0.000 0.000 -0.991
H5 1.463 1.051 0.000
H6 1.463 -1.051 0.000
H7 -1.463 1.051 0.000
H8 -1.463 -1.051 0.000

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6 H7 H8
B11.76921.32851.32851.19961.19962.57202.5720
B21.76921.32851.32852.57202.57201.19961.1996
H31.32851.32851.98222.05602.05602.05602.0560
H41.32851.32851.98222.05602.05602.05602.0560
H51.19962.57202.05602.05602.10202.92583.6026
H61.19962.57202.05602.05602.10203.60262.9258
H72.57201.19962.05602.05602.92583.60262.1020
H82.57201.19962.05602.05603.60262.92582.1020

picture of Diborane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
B1 H3 B2 83.501 B1 H4 B2 83.501
H3 B1 H4 96.499 H3 B1 H5 108.724
H3 B1 H6 108.724 H3 B2 H4 96.499
H3 B2 H7 108.724 H3 B2 H8 108.724
H4 B1 H5 108.724 H4 B1 H6 108.724
H4 B2 H7 108.724 H4 B2 H8 108.724
H5 B1 H6 122.359 H7 B2 H8 122.359
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -0.338      
2 B -0.338      
3 H 0.138      
4 H 0.138      
5 H 0.100      
6 H 0.100      
7 H 0.100      
8 H 0.100      


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 -18.652 0.000 0.000
y 0.000 -17.876 0.000
z 0.000 0.000 -15.416
Traceless
 xyz
x -2.005 0.000 0.000
y 0.000 -0.842 0.000
z 0.000 0.000 2.848
Polar
3z2-r25.695
x2-y2-0.775
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.472 0.000 0.000
y 0.000 3.757 0.000
z 0.000 0.000 3.160


<r2> (average value of r2) Å2
<r2> 33.583
(<r2>)1/2 5.795