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 Al(CH3)3 (trimethyl aluminum)

using model chemistry: HF/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 HF/6-31G
 hartrees
Energy at 0K-360.700801
Energy at 298.15K-360.708643
HF Energy-360.700801
Nuclear repulsion energy149.559886
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/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' 3248 2932 0.00      
2 A' 3157 2850 0.00      
3 A' 1609 1453 0.00      
4 A' 1421 1283 0.00      
5 A' 703 635 0.00      
6 A' 524 473 0.00      
7 A" 3220 2907 82.92      
8 A" 1611 1455 15.93      
9 A" 854 771 145.48      
10 A" 200 181 15.63      
11 A" 41 37 0.04      
12 E' 3248 2933 43.03      
12 E' 3248 2933 43.03      
13 E' 3154 2848 27.17      
13 E' 3154 2848 27.17      
14 E' 1608 1452 4.58      
14 E' 1608 1452 4.58      
15 E' 1415 1278 70.56      
15 E' 1415 1278 70.56      
16 E' 872 787 173.13      
16 E' 872 787 173.13      
17 E' 674 609 25.60      
17 E' 674 609 25.60      
18 E' 174 157 6.93      
18 E' 174 157 6.93      
19 E" 3219 2906 0.00      
19 E" 3219 2906 0.00      
20 E" 1612 1455 0.00      
20 E" 1612 1455 0.00      
21 E" 688 622 0.00      
21 E" 688 622 0.00      
22 E" 25 22 0.00      
22 E" 25 22 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24981.4 cm-1
Scaled (by 0.9029) Zero Point Vibrational Energy (zpe) 22555.7 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/6-31G
ABC
0.16163 0.16163 0.08455

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/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 1.992 0.000
C3 -1.725 -0.996 0.000
C4 1.725 -0.996 0.000
H5 -1.005 2.404 0.000
H6 -1.580 -2.072 0.000
H7 2.584 -0.332 0.000
H8 0.520 2.384 0.873
H9 0.520 2.384 -0.873
H10 -2.324 -0.741 0.873
H11 -2.324 -0.741 -0.873
H12 1.804 -1.642 0.873
H13 1.804 -1.642 -0.873

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.99211.99211.99212.60572.60572.60572.59122.59122.59122.59122.59122.5912
C21.99213.45043.45041.08604.36053.47571.08911.08913.69263.69264.15044.1504
C31.99213.45043.45043.47571.08604.36054.15044.15041.08911.08913.69263.6926
C41.99213.45043.45044.36053.47571.08603.69263.69264.15044.15041.08911.0891
H52.60571.08603.47574.36054.51334.51331.75751.75753.52093.52095.00275.0027
H62.60574.36051.08603.47574.51334.51335.00275.00271.75751.75753.52093.5209
H72.60573.47574.36051.08604.51334.51333.52093.52095.00275.00271.75751.7575
H82.59121.08914.15043.69261.75755.00273.52091.74604.22564.57214.22564.5721
H92.59121.08914.15043.69261.75755.00273.52091.74604.57214.22564.57214.2256
H102.59123.69261.08914.15043.52091.75755.00274.22564.57211.74604.22564.5721
H112.59123.69261.08914.15043.52091.75755.00274.57214.22561.74604.57214.2256
H122.59124.15043.69261.08915.00273.52091.75754.22564.57214.22564.57211.7460
H132.59124.15043.69261.08915.00273.52091.75754.57214.22564.57214.22561.7460

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 112.303 Al1 C2 H8 111.064
Al1 C2 H9 111.064 Al1 C3 H6 112.303
Al1 C3 H10 111.064 Al1 C3 H11 111.064
Al1 C4 H7 112.303 Al1 C4 H12 111.064
Al1 C4 H13 111.064 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.798 H5 C2 H9 107.798
H6 C3 H10 107.798 H6 C3 H11 107.798
H7 C4 H12 107.798 H7 C4 H13 107.798
H8 C2 H9 106.562 H10 C3 H11 106.562
H12 C4 H13 106.562
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 1.297      
2 C -0.935      
3 C -0.935      
4 C -0.935      
5 H 0.168      
6 H 0.168      
7 H 0.168      
8 H 0.167      
9 H 0.167      
10 H 0.167      
11 H 0.167      
12 H 0.167      
13 H 0.167      


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 -38.422 0.000 0.000
y 0.000 -38.422 0.000
z 0.000 0.000 -31.244
Traceless
 xyz
x -3.589 0.000 0.000
y 0.000 -3.589 0.000
z 0.000 0.000 7.178
Polar
3z2-r214.356
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 8.123 0.000 0.000
y 0.000 8.123 0.000
z 0.000 0.000 6.230


<r2> (average value of r2) Å2
<r2> 154.587
(<r2>)1/2 12.433