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: PBEPBEultrafine/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at PBEPBEultrafine/6-31+G**
 hartrees
Energy at 0K-53.174286
Energy at 298.15K-53.180040
HF Energy-53.174286
Nuclear repulsion energy31.918726
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/6-31+G**
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 2573 2543 0.00 275.06 0.11 0.21
2 Ag 2160 2136 0.00 86.75 0.07 0.12
3 Ag 1154 1141 0.00 11.87 0.68 0.81
4 Ag 796 787 0.00 16.96 0.21 0.35
5 Au 827 818 0.00 0.00 0.00 0.00
6 B1g 2648 2618 0.00 133.27 0.75 0.86
7 B1g 910 900 0.00 1.52 0.75 0.86
8 B1u 2011 1988 3.90 0.00 0.00 0.00
9 B1u 955 945 12.48 0.00 0.00 0.00
10 B2g 1843 1822 0.00 4.11 0.75 0.86
11 B2g 876 866 0.00 3.88 0.75 0.86
12 B2u 2663 2633 178.99 0.00 0.00 0.00
13 B2u 877 867 0.04 0.00 0.00 0.00
14 B2u 309 306 14.17 0.00 0.00 0.00
15 B3g 952 941 0.00 19.27 0.75 0.86
16 B3u 2559 2530 149.55 0.00 0.00 0.00
17 B3u 1674 1655 361.46 0.00 0.00 0.00
18 B3u 1150 1137 59.34 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 13468.6 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 13315.0 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/6-31+G**
ABC
2.63479 0.60757 0.55788

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

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 0.987
H4 0.000 0.000 -0.987
H5 1.465 1.049 0.000
H6 1.465 -1.049 0.000
H7 -1.465 1.049 0.000
H8 -1.465 -1.049 0.000

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6 H7 H8
B11.76381.32361.32361.20031.20032.57102.5710
B21.76381.32361.32362.57102.57101.20031.2003
H31.32361.32361.97392.05472.05472.05472.0547
H41.32361.32361.97392.05472.05472.05472.0547
H51.20032.57102.05472.05472.09772.93093.6042
H61.20032.57102.05472.05472.09773.60422.9309
H72.57101.20032.05472.05472.93093.60422.0977
H82.57101.20032.05472.05473.60422.93092.0977

picture of Diborane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
B1 H3 B2 83.565 B1 H4 B2 83.565
H3 B1 H4 96.435 H3 B1 H5 108.902
H3 B1 H6 108.902 H3 B2 H4 96.435
H3 B2 H7 108.902 H3 B2 H8 108.902
H4 B1 H5 108.902 H4 B1 H6 108.902
H4 B2 H7 108.902 H4 B2 H8 108.902
H5 B1 H6 121.818 H7 B2 H8 121.818
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -0.152      
2 B -0.152      
3 H 0.086      
4 H 0.086      
5 H 0.033      
6 H 0.033      
7 H 0.033      
8 H 0.033      


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 -19.005 0.000 0.000
y 0.000 -17.992 0.000
z 0.000 0.000 -14.974
Traceless
 xyz
x -2.522 0.000 0.000
y 0.000 -1.003 0.000
z 0.000 0.000 3.525
Polar
3z2-r27.050
x2-y2-1.013
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.995 0.000 0.000
y 0.000 4.632 0.000
z 0.000 0.000 3.512


<r2> (average value of r2) Å2
<r2> 33.536
(<r2>)1/2 5.791