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All results from a given calculation for Al(CH3)3 (trimethyl aluminum)

using model chemistry: HSEh1PBE/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3H 1A'
Energy calculated at HSEh1PBE/6-31G*
 hartrees
Energy at 0K-361.914759
Energy at 298.15K-361.922200
Nuclear repulsion energy150.383461
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 HSEh1PBE/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3145 2991 0.00      
2 A' 3049 2900 0.00      
3 A' 1486 1414 0.00      
4 A' 1275 1212 0.00      
5 A' 599 569 0.00      
6 A' 515 490 0.00      
7 A" 3120 2967 41.63      
8 A" 1489 1416 6.44      
9 A" 746 710 125.18      
10 A" 182 173 5.36      
11 A" 48 45 0.08      
12 E' 3146 2992 25.27      
12 E' 3146 2992 25.28      
13 E' 3047 2898 7.99      
13 E' 3047 2898 7.99      
14 E' 1484 1412 1.14      
14 E' 1484 1412 1.14      
15 E' 1270 1208 44.99      
15 E' 1270 1208 44.97      
16 E' 781 742 171.42      
16 E' 781 742 171.39      
17 E' 646 615 9.68      
17 E' 646 615 9.68      
18 E' 166 158 2.83      
18 E' 166 158 2.83      
19 E" 3119 2967 0.00      
19 E" 3119 2967 0.00      
20 E" 1487 1414 0.00      
20 E" 1487 1414 0.00      
21 E" 574 546 0.00      
21 E" 574 546 0.00      
22 E" 27 26 0.00      
22 E" 27 26 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23575.5 cm-1
Scaled (by 0.951) Zero Point Vibrational Energy (zpe) 22420.3 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 HSEh1PBE/6-31G*
ABC
0.16437 0.16437 0.08609

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G*

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 1.970 0.000
C3 -1.706 -0.985 0.000
C4 1.706 -0.985 0.000
H5 -1.006 2.405 0.000
H6 -1.580 -2.073 0.000
H7 2.586 -0.331 0.000
H8 0.530 2.367 0.876
H9 0.530 2.367 -0.876
H10 -2.315 -0.725 0.876
H11 -2.315 -0.725 -0.876
H12 1.785 -1.643 0.876
H13 1.785 -1.643 -0.876

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.96981.96981.96982.60672.60672.60672.57942.57942.57942.57942.57942.5794
C21.96983.41193.41191.09584.34103.46131.09861.09863.65913.65914.12374.1237
C31.96983.41193.41193.46131.09584.34104.12374.12371.09861.09863.65913.6591
C41.96983.41193.41194.34103.46131.09583.65913.65914.12374.12371.09861.0986
H52.60671.09583.46134.34104.51504.51501.76861.76863.50393.50394.99404.9940
H62.60674.34101.09583.46134.51504.51504.99404.99401.76861.76863.50393.5039
H72.60673.46134.34101.09584.51504.51503.50393.50394.99404.99401.76861.7686
H82.57941.09864.12373.65911.76864.99403.50391.75294.20184.55284.20184.5528
H92.57941.09864.12373.65911.76864.99403.50391.75294.55284.20184.55284.2018
H102.57943.65911.09864.12373.50391.76864.99404.20184.55281.75294.20184.5528
H112.57943.65911.09864.12373.50391.76864.99404.55284.20181.75294.55284.2018
H122.57944.12373.65911.09864.99403.50391.76864.20184.55284.20184.55281.7529
H132.57944.12373.65911.09864.99403.50391.76864.55284.20184.55284.20181.7529

picture of trimethyl aluminum state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Al1 C2 H5 113.389 Al1 C2 H8 111.212
Al1 C2 H9 111.212 Al1 C3 H6 113.389
Al1 C3 H10 111.212 Al1 C3 H11 111.212
Al1 C4 H7 113.389 Al1 C4 H12 111.212
Al1 C4 H13 111.212 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.401 H5 C2 H9 107.401
H6 C3 H10 107.401 H6 C3 H11 107.401
H7 C4 H12 107.401 H7 C4 H13 107.401
H8 C2 H9 105.838 H10 C3 H11 105.838
H12 C4 H13 105.838
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 0.769      
2 C -0.804      
3 C -0.804      
4 C -0.804      
5 H 0.184      
6 H 0.184      
7 H 0.184      
8 H 0.182      
9 H 0.182      
10 H 0.182      
11 H 0.182      
12 H 0.182      
13 H 0.182      


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 -35.907 0.000 0.000
y 0.000 -35.907 0.000
z 0.000 0.000 -30.866
Traceless
 xyz
x -2.520 0.000 0.000
y 0.000 -2.520 0.000
z 0.000 0.000 5.041
Polar
3z2-r210.081
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 8.601 -0.000 0.000
y -0.000 8.601 0.000
z 0.000 0.000 6.652


<r2> (average value of r2) Å2
<r2> 151.527
(<r2>)1/2 12.310