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

using model chemistry: HF/SDD

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/SDD
 hartrees
Energy at 0K-360.724976
Energy at 298.15K-360.732913
HF Energy-360.724976
Nuclear repulsion energy150.185819
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/SDD
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' 3246 2923 0.00      
2 A' 3150 2836 0.00      
3 A' 1603 1444 0.00      
4 A' 1425 1283 0.00      
5 A' 714 643 0.00      
6 A' 540 486 0.00      
7 A" 3217 2897 106.70      
8 A" 1603 1443 17.27      
9 A" 856 770 143.96      
10 A" 201 181 17.58      
11 A" 50 45 0.03      
12 E' 3247 2924 59.50      
12 E' 3247 2924 59.50      
13 E' 3147 2833 55.04      
13 E' 3147 2833 55.04      
14 E' 1600 1440 5.38      
14 E' 1600 1440 5.38      
15 E' 1420 1278 89.05      
15 E' 1420 1278 89.05      
16 E' 880 792 179.86      
16 E' 880 792 179.86      
17 E' 686 617 33.03      
17 E' 686 617 33.03      
18 E' 182 164 8.19      
18 E' 182 164 8.19      
19 E" 3217 2897 0.00      
19 E" 3217 2897 0.00      
20 E" 1603 1443 0.00      
20 E" 1603 1443 0.00      
21 E" 691 622 0.00      
21 E" 691 622 0.00      
22 E" 32 29 0.00      
22 E" 32 29 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 25005.9 cm-1
Scaled (by 0.9004) Zero Point Vibrational Energy (zpe) 22515.3 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 HF/SDD
ABC
0.16334 0.16334 0.08548

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/SDD

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 1.979 0.000
C3 -1.714 -0.990 0.000
C4 1.714 -0.990 0.000
H5 -1.004 2.396 0.000
H6 -1.573 -2.068 0.000
H7 2.577 -0.328 0.000
H8 0.519 2.377 0.872
H9 0.519 2.377 -0.872
H10 -2.318 -0.739 0.872
H11 -2.318 -0.739 -0.872
H12 1.799 -1.638 0.872
H13 1.799 -1.638 -0.872

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.97911.97911.97912.59772.59772.59772.58482.58482.58482.58482.58482.5848
C21.97913.42793.42791.08724.34153.45891.09031.09033.67733.67734.13324.1332
C31.97913.42793.42793.45891.08724.34154.13324.13321.09031.09033.67733.6773
C41.97913.42793.42794.34153.45891.08723.67733.67734.13324.13321.09031.0903
H52.59771.08723.45894.34154.49934.49931.75571.75573.50903.50904.98934.9893
H62.59774.34151.08723.45894.49934.49934.98934.98931.75571.75573.50903.5090
H72.59773.45894.34151.08724.49934.49933.50903.50904.98934.98931.75571.7557
H82.58481.09034.13323.67731.75574.98933.50901.74424.21464.56124.21464.5612
H92.58481.09034.13323.67731.75574.98933.50901.74424.56124.21464.56124.2146
H102.58483.67731.09034.13323.50901.75574.98934.21464.56121.74424.21464.5612
H112.58483.67731.09034.13323.50901.75574.98934.56124.21461.74424.56124.2146
H122.58484.13323.67731.09034.98933.50901.75574.21464.56124.21464.56121.7442
H132.58484.13323.67731.09034.98933.50901.75574.56124.21464.56124.21461.7442

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 112.534 Al1 C2 H8 111.414
Al1 C2 H9 111.414 Al1 C3 H6 112.534
Al1 C3 H10 111.414 Al1 C3 H11 111.414
Al1 C4 H7 112.534 Al1 C4 H12 111.414
Al1 C4 H13 111.414 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.464 H5 C2 H9 107.464
H6 C3 H10 107.464 H6 C3 H11 107.464
H7 C4 H12 107.464 H7 C4 H13 107.464
H8 C2 H9 106.230 H10 C3 H11 106.230
H12 C4 H13 106.230
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 1.645      
2 C -1.174      
3 C -1.174      
4 C -1.174      
5 H 0.208      
6 H 0.208      
7 H 0.208      
8 H 0.209      
9 H 0.209      
10 H 0.209      
11 H 0.209      
12 H 0.209      
13 H 0.209      


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 -39.314 0.000 0.000
y 0.000 -39.314 0.000
z 0.000 0.000 -31.380
Traceless
 xyz
x -3.967 0.000 0.000
y 0.000 -3.967 0.000
z 0.000 0.000 7.934
Polar
3z2-r215.868
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 8.229 0.000 0.000
y 0.000 8.229 0.000
z 0.000 0.000 6.302


<r2> (average value of r2) Å2
<r2> 153.739
(<r2>)1/2 12.399