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: B1B95/CEP-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 B1B95/CEP-31G
 hartrees
Energy at 0K-9.086576
Energy at 298.15K-9.092436
HF Energy-9.086576
Nuclear repulsion energy18.557874
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 B1B95/CEP-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 2667 2554 0.00      
2 Ag 2104 2014 0.00      
3 Ag 1150 1101 0.00      
4 Ag 819 784 0.00      
5 Au 842 807 0.00      
6 B1g 2787 2668 0.00      
7 B1g 922 883 0.00      
8 B1u 1969 1885 18.43      
9 B1u 987 945 1.70      
10 B2g 1865 1786 0.00      
11 B2g 907 868 0.00      
12 B2u 2801 2682 133.70      
13 B2u 953 912 0.09      
14 B2u 352 337 12.44      
15 B3g 1055 1010 0.00      
16 B3u 2632 2520 196.45      
17 B3u 1715 1642 621.87      
18 B3u 1138 1090 64.67      

Unscaled Zero Point Vibrational Energy (zpe) 13831.7 cm-1
Scaled (by 0.9575) Zero Point Vibrational Energy (zpe) 13243.8 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 B1B95/CEP-31G
ABC
2.64093 0.57891 0.53319

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/CEP-31G

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.911 0.000 0.000
B2 -0.911 0.000 0.000
H3 0.000 0.000 0.982
H4 0.000 0.000 -0.982
H5 1.486 1.049 0.000
H6 1.486 -1.049 0.000
H7 -1.486 1.049 0.000
H8 -1.486 -1.049 0.000

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6 H7 H8
B11.82231.33951.33951.19641.19642.61642.6164
B21.82231.33951.33952.61642.61641.19641.1964
H31.33951.33951.96372.06702.06702.06702.0670
H41.33951.33951.96372.06702.06702.06702.0670
H51.19642.61642.06702.06702.09892.97123.6378
H61.19642.61642.06702.06702.09893.63782.9712
H72.61641.19642.06702.06702.97123.63782.0989
H82.61641.19642.06702.06703.63782.97122.0989

picture of Diborane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
B1 H3 B2 85.721 B1 H4 B2 85.721
H3 B1 H4 94.279 H3 B1 H5 109.063
H3 B1 H6 109.063 H3 B2 H4 94.279
H3 B2 H7 109.063 H3 B2 H8 109.063
H4 B1 H5 109.063 H4 B1 H6 109.063
H4 B2 H7 109.063 H4 B2 H8 109.063
H5 B1 H6 122.609 H7 B2 H8 122.609
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -0.498      
2 B -0.498      
3 H 0.181      
4 H 0.181      
5 H 0.158      
6 H 0.158      
7 H 0.158      
8 H 0.158      


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 -18.518 0.000 0.000
y 0.000 -16.973 0.000
z 0.000 0.000 -14.753
Traceless
 xyz
x -2.655 0.000 0.000
y 0.000 -0.338 0.000
z 0.000 0.000 2.992
Polar
3z2-r25.984
x2-y2-1.545
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.214 0.000 0.000
y 0.000 2.922 0.000
z 0.000 0.000 2.678


<r2> (average value of r2) Å2
<r2> 30.603
(<r2>)1/2 5.532