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

using model chemistry: B3LYP/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3H 1A'
Energy calculated at B3LYP/CEP-121G
 hartrees
Energy at 0K-24.368497
Energy at 298.15K-24.376154
HF Energy-24.368497
Nuclear repulsion energy55.573404
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 B3LYP/CEP-121G
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' 3060 2982 0.00      
2 A' 2957 2881 0.00      
3 A' 1486 1448 0.00      
4 A' 1297 1264 0.00      
5 A' 652 636 0.00      
6 A' 504 491 0.00      
7 A" 3029 2952 95.60      
8 A" 1487 1449 16.67      
9 A" 795 775 118.15      
10 A" 185 181 8.79      
11 A" 47 46 0.12      
12 E' 3061 2983 56.16      
12 E' 3061 2983 56.14      
13 E' 2954 2879 35.20      
13 E' 2954 2879 35.19      
14 E' 1484 1446 4.49      
14 E' 1484 1446 4.49      
15 E' 1294 1261 69.87      
15 E' 1294 1261 69.86      
16 E' 815 795 160.13      
16 E' 815 795 160.11      
17 E' 647 630 26.66      
17 E' 647 630 26.66      
18 E' 168 164 5.76      
18 E' 168 164 5.76      
19 E" 3029 2952 0.00      
19 E" 3029 2952 0.00      
20 E" 1485 1448 0.00      
20 E" 1485 1448 0.00      
21 E" 633 617 0.00      
21 E" 633 617 0.00      
22 E" 28 27 0.00      
22 E" 28 27 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23347.1 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 22751.8 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 B3LYP/CEP-121G
ABC
0.16220 0.16220 0.08493

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 1.984 0.000
C3 -1.718 -0.992 0.000
C4 1.718 -0.992 0.000
H5 -1.012 2.413 0.000
H6 -1.584 -2.083 0.000
H7 2.596 -0.330 0.000
H8 0.530 2.386 0.880
H9 0.530 2.386 -0.880
H10 -2.331 -0.734 0.880
H11 -2.331 -0.734 -0.880
H12 1.801 -1.652 0.880
H13 1.801 -1.652 -0.880

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.98391.98391.98392.61672.61672.61672.59732.59732.59732.59732.59732.5973
C21.98393.43623.43621.09944.36443.47731.10301.10303.68703.68704.15154.1515
C31.98393.43623.43623.47731.09944.36444.15154.15151.10301.10303.68703.6870
C41.98393.43623.43624.36443.47731.09943.68703.68704.15154.15151.10301.1030
H52.61671.09943.47734.36444.53224.53221.77581.77583.52373.52375.02095.0209
H62.61674.36441.09943.47734.53224.53225.02095.02091.77581.77583.52373.5237
H72.61673.47734.36441.09944.53224.53223.52373.52375.02095.02091.77581.7758
H82.59731.10304.15153.68701.77585.02093.52371.76024.23264.58404.23264.5840
H92.59731.10304.15153.68701.77585.02093.52371.76024.58404.23264.58404.2326
H102.59733.68701.10304.15153.52371.77585.02094.23264.58401.76024.23264.5840
H112.59733.68701.10304.15153.52371.77585.02094.58404.23261.76024.58404.2326
H122.59734.15153.68701.10305.02093.52371.77584.23264.58404.23264.58401.7602
H132.59734.15153.68701.10305.02093.52371.77584.58404.23264.58404.23261.7602

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 112.973 Al1 C2 H8 111.356
Al1 C2 H9 111.356 Al1 C3 H6 112.973
Al1 C3 H10 111.356 Al1 C3 H11 111.356
Al1 C4 H7 112.973 Al1 C4 H12 111.356
Al1 C4 H13 111.356 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.465 H5 C2 H9 107.465
H6 C3 H10 107.465 H6 C3 H11 107.465
H7 C4 H12 107.465 H7 C4 H13 107.465
H8 C2 H9 105.860 H10 C3 H11 105.860
H12 C4 H13 105.860
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 1.114      
2 C -0.851      
3 C -0.851      
4 C -0.851      
5 H 0.159      
6 H 0.159      
7 H 0.159      
8 H 0.160      
9 H 0.160      
10 H 0.160      
11 H 0.160      
12 H 0.160      
13 H 0.160      


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 -36.578 0.000 0.000
y 0.000 -36.578 0.000
z 0.000 0.000 -30.317
Traceless
 xyz
x -3.130 0.000 0.000
y 0.000 -3.130 0.000
z 0.000 0.000 6.261
Polar
3z2-r212.521
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 9.585 0.000 0.000
y 0.000 9.584 0.000
z 0.000 0.000 7.222


<r2> (average value of r2) Å2
<r2> 129.789
(<r2>)1/2 11.393