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

using model chemistry: PBEPBE/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3H 1A'
Energy calculated at PBEPBE/STO-3G
 hartrees
Energy at 0K-357.546643
Energy at 298.15K-357.554411
HF Energy-357.546643
Nuclear repulsion energy152.880320
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 PBEPBE/STO-3G
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' 3399 3105 0.00      
2 A' 3223 2945 0.00      
3 A' 1678 1533 0.00      
4 A' 1455 1329 0.00      
5 A' 773 707 0.00      
6 A' 621 567 0.00      
7 A" 3381 3089 8.55      
8 A" 1681 1536 2.53      
9 A" 868 793 106.01      
10 A" 212 194 16.43      
11 A" 36 33 0.01      
12 E' 3400 3106 7.23      
12 E' 3400 3106 7.22      
13 E' 3224 2945 0.24      
13 E' 3224 2945 0.24      
14 E' 1678 1533 1.85      
14 E' 1678 1533 1.85      
15 E' 1453 1328 10.23      
15 E' 1453 1328 10.23      
16 E' 916 837 143.46      
16 E' 916 837 143.46      
17 E' 789 721 5.24      
17 E' 789 721 5.24      
18 E' 204 186 8.36      
18 E' 204 186 8.36      
19 E" 3381 3088 0.00      
19 E" 3381 3088 0.00      
20 E" 1678 1533 0.00      
20 E" 1678 1533 0.00      
21 E" 736 673 0.00      
21 E" 736 673 0.00      
22 E" 17 15 0.00      
22 E" 17 15 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26137.6 cm-1
Scaled (by 0.9136) Zero Point Vibrational Energy (zpe) 23879.3 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 PBEPBE/STO-3G
ABC
0.17131 0.17131 0.08996

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/STO-3G

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 1.922 0.000
C3 -1.665 -0.961 0.000
C4 1.665 -0.961 0.000
H5 -1.013 2.358 0.000
H6 -1.536 -2.056 0.000
H7 2.549 -0.302 0.000
H8 0.526 2.328 0.882
H9 0.526 2.328 -0.882
H10 -2.279 -0.709 0.882
H11 -2.279 -0.709 -0.882
H12 1.753 -1.620 0.882
H13 1.753 -1.620 -0.882

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.92231.92231.92232.56632.56632.56632.54482.54482.54482.54482.54482.5448
C21.92233.32953.32951.10274.26453.38251.10441.10443.59113.59114.04954.0495
C31.92233.32953.32953.38251.10274.26454.04954.04951.10441.10443.59113.5911
C41.92233.32953.32954.26453.38251.10273.59113.59114.04954.04951.10441.1044
H52.56631.10273.38254.26454.44504.44501.77411.77413.43313.43314.92474.9247
H62.56634.26451.10273.38254.44504.44504.92474.92471.77411.77413.43313.4331
H72.56633.38254.26451.10274.44504.44503.43313.43314.92474.92471.77411.7741
H82.54481.10444.04953.59111.77414.92473.43311.76444.13454.49524.13454.4952
H92.54481.10444.04953.59111.77414.92473.43311.76444.49524.13454.49524.1345
H102.54483.59111.10444.04953.43311.77414.92474.13454.49521.76444.13454.4952
H112.54483.59111.10444.04953.43311.77414.92474.49524.13451.76444.49524.1345
H122.54484.04953.59111.10444.92473.43311.77414.13454.49524.13454.49521.7644
H132.54484.04953.59111.10444.92473.43311.77414.49524.13454.49524.13451.7644

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 113.272 Al1 C2 H8 111.574
Al1 C2 H9 111.574 Al1 C3 H6 113.272
Al1 C3 H10 111.574 Al1 C3 H11 111.574
Al1 C4 H7 113.272 Al1 C4 H12 111.574
Al1 C4 H13 111.574 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 106.989 H5 C2 H9 106.989
H6 C3 H10 106.989 H6 C3 H11 106.989
H7 C4 H12 106.989 H7 C4 H13 106.989
H8 C2 H9 106.024 H10 C3 H11 106.024
H12 C4 H13 106.024
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 0.900      
2 C -0.459      
3 C -0.459      
4 C -0.459      
5 H 0.053      
6 H 0.053      
7 H 0.053      
8 H 0.053      
9 H 0.053      
10 H 0.053      
11 H 0.053      
12 H 0.053      
13 H 0.053      


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 -33.605 0.000 0.000
y 0.000 -33.605 0.000
z 0.000 0.000 -27.637
Traceless
 xyz
x -2.984 0.000 0.000
y 0.000 -2.984 0.000
z 0.000 0.000 5.968
Polar
3z2-r211.936
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 4.449 0.000 0.000
y 0.000 4.449 0.000
z 0.000 0.000 3.108


<r2> (average value of r2) Å2
<r2> 144.874
(<r2>)1/2 12.036