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: B3PW91/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at B3PW91/6-311+G(3df,2p)
 hartrees
Energy at 0K-53.280705
Energy at 298.15K-53.286552
HF Energy-53.280705
Nuclear repulsion energy32.190445
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 B3PW91/6-311+G(3df,2p)
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 2613 2501 0.00 294.27 0.07 0.13
2 Ag 2180 2086 0.00 83.33 0.05 0.09
3 Ag 1191 1141 0.00 5.85 0.65 0.79
4 Ag 811 777 0.00 18.45 0.14 0.25
5 Au 847 811 0.00 0.00 0.00 0.00
6 B1g 2689 2574 0.00 115.97 0.75 0.86
7 B1g 929 890 0.00 0.50 0.75 0.86
8 B1u 2019 1932 4.73 0.00 0.00 0.00
9 B1u 981 939 21.67 0.00 0.00 0.00
10 B2g 1874 1794 0.00 3.31 0.75 0.86
11 B2g 894 856 0.00 0.05 0.75 0.86
12 B2u 2704 2588 162.09 0.00 0.00 0.00
13 B2u 918 878 0.05 0.00 0.00 0.00
14 B2u 335 321 17.18 0.00 0.00 0.00
15 B3g 994 952 0.00 5.41 0.75 0.86
16 B3u 2599 2488 142.02 0.00 0.00 0.00
17 B3u 1708 1635 412.08 0.00 0.00 0.00
18 B3u 1183 1133 64.47 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 13734.5 cm-1
Scaled (by 0.9573) Zero Point Vibrational Energy (zpe) 13148.1 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 B3PW91/6-311+G(3df,2p)
ABC
2.68769 0.61675 0.56687

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311+G(3df,2p)

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.875 0.000 0.000
B2 -0.875 0.000 0.000
H3 0.000 0.000 0.979
H4 0.000 0.000 -0.979
H5 1.454 1.037 0.000
H6 1.454 -1.037 0.000
H7 -1.454 1.037 0.000
H8 -1.454 -1.037 0.000

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6 H7 H8
B11.75091.31371.31371.18791.18792.55012.5501
B21.75091.31371.31372.55012.55011.18791.1879
H31.31371.31371.95892.03722.03722.03722.0372
H41.31371.31371.95892.03722.03722.03722.0372
H51.18792.55012.03722.03722.07482.90833.5726
H61.18792.55012.03722.03722.07483.57262.9083
H72.55011.18792.03722.03722.90833.57262.0748
H82.55011.18792.03722.03723.57262.90832.0748

picture of Diborane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
B1 H3 B2 83.583 B1 H4 B2 83.583
H3 B1 H4 96.417 H3 B1 H5 108.945
H3 B1 H6 108.945 H3 B2 H4 96.417
H3 B2 H7 108.945 H3 B2 H8 108.945
H4 B1 H5 108.945 H4 B1 H6 108.945
H4 B2 H7 108.945 H4 B2 H8 108.945
H5 B1 H6 121.691 H7 B2 H8 121.691
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -0.404      
2 B -0.404      
3 H 0.250      
4 H 0.250      
5 H 0.077      
6 H 0.077      
7 H 0.077      
8 H 0.077      


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 -18.746 0.000 0.000
y 0.000 -17.793 0.000
z 0.000 0.000 -14.760
Traceless
 xyz
x -2.469 0.000 0.000
y 0.000 -1.040 0.000
z 0.000 0.000 3.509
Polar
3z2-r27.018
x2-y2-0.953
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.932 0.000 0.000
y 0.000 4.826 0.000
z 0.000 0.000 4.161


<r2> (average value of r2) Å2
<r2> 33.026
(<r2>)1/2 5.747