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All results from a given calculation for AlH3 (aluminum trihydride)

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 D3H 1A1'
Energy calculated at HF/CEP-31G
 hartrees
Energy at 0K-3.604414
Energy at 298.15K-3.606849
HF Energy-3.604414
Nuclear repulsion energy3.536573
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 A1' 1936 1745 0.00      
2 A2" 730 658 458.55      
3 E' 1949 1757 400.73      
3 E' 1949 1757 400.73      
4 E' 784 707 348.07      
4 E' 784 707 348.07      

Unscaled Zero Point Vibrational Energy (zpe) 4066.0 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 3665.1 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 HF/CEP-31G
ABC
4.32432 4.32432 2.16216

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

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
H2 0.000 1.606 0.000
H3 1.391 -0.803 0.000
H4 -1.391 -0.803 0.000

Atom - Atom Distances (Å)
  Al1 H2 H3 H4
Al11.60581.60581.6058
H21.60582.78142.7814
H31.60582.78142.7814
H41.60582.78142.7814

picture of aluminum trihydride state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 Al1 H3 120.000 H2 Al1 H4 120.000
H3 Al1 H4 120.000
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 Al 0.678      
2 H -0.226      
3 H -0.226      
4 H -0.226      


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 -17.265 0.000 0.000
y 0.000 -17.265 0.000
z 0.000 0.000 -9.951
Traceless
 xyz
x -3.657 0.000 0.000
y 0.000 -3.657 0.000
z 0.000 0.000 7.315
Polar
3z2-r214.629
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.240 0.000 0.000
y 0.000 3.240 0.000
z 0.000 0.000 1.706


<r2> (average value of r2) Å2
<r2> 16.997
(<r2>)1/2 4.123