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

using model chemistry: BLYP/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 BLYP/6-31G**
 hartrees
Energy at 0K-362.085859
Energy at 298.15K-362.093171
HF Energy-362.085859
Nuclear repulsion energy149.211835
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 BLYP/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' 3032 3009 0.00      
2 A' 2948 2925 0.00      
3 A' 1436 1425 0.00      
4 A' 1229 1220 0.00      
5 A' 590 585 0.00      
6 A' 491 487 0.00      
7 A" 3005 2982 56.68      
8 A" 1441 1430 1.65      
9 A" 724 719 103.06      
10 A" 178 176 4.06      
11 A" 45 45 0.07      
12 E' 3033 3009 35.03      
12 E' 3033 3009 35.05      
13 E' 2946 2923 12.66      
13 E' 2946 2923 12.66      
14 E' 1435 1424 0.38      
14 E' 1435 1424 0.38      
15 E' 1224 1214 19.49      
15 E' 1224 1214 19.48      
16 E' 758 752 155.18      
16 E' 758 752 155.16      
17 E' 620 615 14.58      
17 E' 620 615 14.58      
18 E' 169 167 2.58      
18 E' 169 167 2.58      
19 E" 3005 2981 0.00      
19 E" 3005 2981 0.00      
20 E" 1438 1427 0.00      
20 E" 1438 1427 0.00      
21 E" 558 554 0.00      
21 E" 558 554 0.00      
22 E" 21 21 0.00      
22 E" 21 21 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 22764.9 cm-1
Scaled (by 0.9923) Zero Point Vibrational Energy (zpe) 22589.6 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 BLYP/6-31G**
ABC
0.16171 0.16171 0.08467

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/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 1.986 0.000
C3 -1.720 -0.993 0.000
C4 1.720 -0.993 0.000
H5 -1.010 2.429 0.000
H6 -1.599 -2.089 0.000
H7 2.608 -0.340 0.000
H8 0.534 2.386 0.881
H9 0.534 2.386 -0.881
H10 -2.334 -0.731 0.881
H11 -2.334 -0.731 -0.881
H12 1.799 -1.656 0.881
H13 1.799 -1.656 -0.881

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.98631.98631.98632.63032.63032.63032.59922.59922.59922.59922.59922.5992
C21.98633.44033.44031.10234.37743.49511.10531.10533.68833.68834.15674.1567
C31.98633.44033.44033.49511.10234.37744.15674.15671.10531.10533.68833.6883
C41.98633.44033.44034.37743.49511.10233.68833.68834.15674.15671.10531.1053
H52.63031.10233.49514.37744.55594.55591.77791.77793.53723.53725.03495.0349
H62.63034.37741.10233.49514.55594.55595.03495.03491.77791.77793.53723.5372
H72.63033.49514.37741.10234.55594.55593.53723.53725.03495.03491.77791.7779
H82.59921.10534.15673.68831.77795.03493.53721.76224.23544.58734.23544.5873
H92.59921.10534.15673.68831.77795.03493.53721.76224.58734.23544.58734.2354
H102.59923.68831.10534.15673.53721.77795.03494.23544.58731.76224.23544.5873
H112.59923.68831.10534.15673.53721.77795.03494.58734.23541.76224.58734.2354
H122.59924.15673.68831.10535.03493.53721.77794.23544.58734.23544.58731.7622
H132.59924.15673.68831.10535.03493.53721.77794.58734.23544.58734.23541.7622

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 113.675 Al1 C2 H8 111.215
Al1 C2 H9 111.215 Al1 C3 H6 113.675
Al1 C3 H10 111.215 Al1 C3 H11 111.215
Al1 C4 H7 113.675 Al1 C4 H12 111.215
Al1 C4 H13 111.215 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.294 H5 C2 H9 107.294
H6 C3 H10 107.294 H6 C3 H11 107.294
H7 C4 H12 107.294 H7 C4 H13 107.294
H8 C2 H9 105.726 H10 C3 H11 105.726
H12 C4 H13 105.726
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 0.638      
2 C -0.520      
3 C -0.520      
4 C -0.520      
5 H 0.104      
6 H 0.104      
7 H 0.104      
8 H 0.102      
9 H 0.102      
10 H 0.102      
11 H 0.102      
12 H 0.102      
13 H 0.102      


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 -36.055 0.000 0.000
y 0.000 -36.055 0.000
z 0.000 0.000 -31.397
Traceless
 xyz
x -2.329 0.000 0.000
y 0.000 -2.329 0.000
z 0.000 0.000 4.658
Polar
3z2-r29.315
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 9.173 0.000 0.000
y 0.000 9.173 0.000
z 0.000 0.000 6.966


<r2> (average value of r2) Å2
<r2> 153.856
(<r2>)1/2 12.404