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

using model chemistry: B3LYP/6-311G*

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/6-311G*
 hartrees
Energy at 0K-362.238649
Energy at 298.15K-362.246100
HF Energy-362.238649
Nuclear repulsion energy150.217546
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/6-311G*
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' 3078 2975 0.00      
2 A' 3003 2902 0.00      
3 A' 1481 1431 0.00      
4 A' 1277 1234 0.00      
5 A' 607 586 0.00      
6 A' 512 495 0.00      
7 A" 3051 2948 64.92      
8 A" 1484 1434 10.74      
9 A" 743 718 105.60      
10 A" 184 178 8.62      
11 A" 50 48 0.01      
12 E' 3079 2975 38.45      
12 E' 3079 2975 38.47      
13 E' 3001 2900 18.00      
13 E' 3001 2900 18.00      
14 E' 1479 1429 1.94      
14 E' 1479 1429 1.94      
15 E' 1274 1231 46.51      
15 E' 1274 1231 46.52      
16 E' 775 749 159.14      
16 E' 775 749 159.14      
17 E' 643 621 17.67      
17 E' 643 621 17.67      
18 E' 168 162 4.57      
18 E' 168 162 4.57      
19 E" 3051 2948 0.00      
19 E" 3051 2948 0.00      
20 E" 1482 1432 0.00      
20 E" 1482 1432 0.00      
21 E" 579 560 0.00      
21 E" 579 560 0.00      
22 E" 20 19 0.00      
22 E" 20 19 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23284.1 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 22499.4 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/6-311G*
ABC
0.16388 0.16388 0.08578

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-311G*

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 1.972 0.000
C3 -1.708 -0.986 0.000
C4 1.708 -0.986 0.000
H5 -1.002 2.413 0.000
H6 -1.589 -2.074 0.000
H7 2.591 -0.339 0.000
H8 0.528 2.377 0.873
H9 0.528 2.377 -0.873
H10 -2.323 -0.731 0.873
H11 -2.323 -0.731 -0.873
H12 1.794 -1.646 0.873
H13 1.794 -1.646 -0.873

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.97231.97231.97232.61292.61292.61292.58652.58652.58652.58652.58652.5865
C21.97233.41613.41611.09454.34733.47201.09741.09743.66923.66924.13194.1319
C31.97233.41613.41613.47201.09454.34734.13194.13191.09741.09743.66923.6692
C41.97233.41613.41614.34733.47201.09453.66923.66924.13194.13191.09741.0974
H52.61291.09453.47204.34734.52574.52571.76181.76183.52023.52025.00565.0056
H62.61294.34731.09453.47204.52574.52575.00565.00561.76181.76183.52023.5202
H72.61293.47204.34731.09454.52574.52573.52023.52025.00565.00561.76181.7618
H82.58651.09744.13193.66921.76185.00563.52021.74544.21734.56424.21734.5642
H92.58651.09744.13193.66921.76185.00563.52021.74544.56424.21734.56424.2173
H102.58653.66921.09744.13193.52021.76185.00564.21734.56421.74544.21734.5642
H112.58653.66921.09744.13193.52021.76185.00564.56424.21731.74544.56424.2173
H122.58654.13193.66921.09745.00563.52021.76184.21734.56424.21734.56421.7454
H132.58654.13193.66921.09745.00563.52021.76184.56424.21734.56424.21731.7454

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 113.762 Al1 C2 H8 111.633
Al1 C2 H9 111.633 Al1 C3 H6 113.762
Al1 C3 H10 111.633 Al1 C3 H11 111.633
Al1 C4 H7 113.762 Al1 C4 H12 111.633
Al1 C4 H13 111.633 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 106.981 H5 C2 H9 106.981
H6 C3 H10 106.981 H6 C3 H11 106.981
H7 C4 H12 106.981 H7 C4 H13 106.981
H8 C2 H9 105.347 H10 C3 H11 105.347
H12 C4 H13 105.347
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 1.128      
2 C -1.046      
3 C -1.046      
4 C -1.046      
5 H 0.228      
6 H 0.228      
7 H 0.228      
8 H 0.221      
9 H 0.221      
10 H 0.221      
11 H 0.221      
12 H 0.221      
13 H 0.221      


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 -37.675 0.000 0.000
y 0.000 -37.675 0.000
z 0.000 0.000 -31.558
Traceless
 xyz
x -3.059 0.000 0.000
y 0.000 -3.059 0.000
z 0.000 0.000 6.117
Polar
3z2-r212.234
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 9.411 0.000 0.000
y 0.000 9.411 0.000
z 0.000 0.000 7.046


<r2> (average value of r2) Å2
<r2> 152.896
(<r2>)1/2 12.365