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All results from a given calculation for B2H6 (Diborane)

using model chemistry: HF/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 HF/CEP-31G*
 hartrees
Energy at 0K-8.815518
Energy at 298.15K-8.821511
HF Energy-8.815518
Nuclear repulsion energy18.665174
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 HF/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 2737 2458 0.00 224.69 0.15 0.27
2 Ag 2209 1984 0.00 71.62 0.20 0.34
3 Ag 1266 1137 0.00 14.59 0.75 0.86
4 Ag 826 742 0.00 19.62 0.33 0.49
5 Au 877 788 0.00 0.00 0.47 0.64
6 B1g 2803 2517 0.00 102.53 0.75 0.86
7 B1g 982 882 0.00 4.16 0.75 0.86
8 B1u 1995 1791 132.83 0.00 0.00 0.00
9 B1u 1060 952 10.73 0.00 0.00 0.00
10 B2g 1889 1697 0.00 11.62 0.75 0.86
11 B2g 860 772 0.00 0.11 0.75 0.86
12 B2u 2821 2533 364.54 0.00 0.00 0.00
13 B2u 1110 997 14.01 0.00 0.00 0.00
14 B2u 400 360 10.81 0.00 0.00 0.00
15 B3g 1196 1074 0.00 13.65 0.75 0.86
16 B3u 2710 2433 244.84 0.00 0.00 0.00
17 B3u 1822 1636 995.20 0.00 0.00 0.00
18 B3u 1239 1113 147.11 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 14401.1 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 12932.2 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 HF/CEP-31G*
ABC
2.67193 0.58449 0.53759

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.908 0.000 0.000
B2 -0.908 0.000 0.000
H3 0.000 0.000 0.970
H4 0.000 0.000 -0.970
H5 1.476 1.046 0.000
H6 1.476 -1.046 0.000
H7 -1.476 1.046 0.000
H8 -1.476 -1.046 0.000

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6 H7 H8
B11.81631.32881.32881.19051.19052.60392.6039
B21.81631.32881.32882.60392.60391.19051.1905
H31.32881.32881.94012.05302.05302.05302.0530
H41.32881.32881.94012.05302.05302.05302.0530
H51.19052.60392.05302.05302.09242.95263.6188
H61.19052.60392.05302.05302.09243.61882.9526
H72.60391.19052.05302.05302.95263.61882.0924
H82.60391.19052.05302.05303.61882.95262.0924

picture of Diborane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
B1 H3 B2 86.225 B1 H4 B2 86.225
H3 B1 H4 93.775 H3 B1 H5 109.035
H3 B1 H6 109.035 H3 B2 H4 93.775
H3 B2 H7 109.035 H3 B2 H8 109.035
H4 B1 H5 109.035 H4 B1 H6 109.035
H4 B2 H7 109.035 H4 B2 H8 109.035
H5 B1 H6 122.992 H7 B2 H8 122.992
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 B -0.330      
2 B -0.330      
3 H 0.129      
4 H 0.129      
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 -18.451 0.000 0.000
y 0.000 -17.304 0.000
z 0.000 0.000 -14.756
Traceless
 xyz
x -2.421 0.000 0.000
y 0.000 -0.700 0.000
z 0.000 0.000 3.122
Polar
3z2-r26.243
x2-y2-1.148
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.876 0.000 0.000
y 0.000 3.000 0.000
z 0.000 0.000 2.650


<r2> (average value of r2) Å2
<r2> 30.442
(<r2>)1/2 5.517