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

using model chemistry: B3LYP/LANL2DZ

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/LANL2DZ
 hartrees
Energy at 0K-121.742961
Energy at 298.15K-121.750598
HF Energy-121.742961
Nuclear repulsion energy83.152189
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/LANL2DZ
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' 3116 2995 0.00      
2 A' 3011 2894 0.00      
3 A' 1492 1434 0.00      
4 A' 1302 1251 0.00      
5 A' 652 626 0.00      
6 A' 511 491 0.00      
7 A" 3086 2967 81.02      
8 A" 1490 1432 21.83      
9 A" 799 768 148.81      
10 A" 186 178 7.86      
11 A" 51 49 0.21      
12 E' 3117 2996 48.59      
12 E' 3117 2996 48.58      
13 E' 3009 2893 29.45      
13 E' 3009 2893 29.46      
14 E' 1487 1429 7.47      
14 E' 1487 1429 7.47      
15 E' 1299 1248 95.09      
15 E' 1299 1248 95.10      
16 E' 823 791 183.37      
16 E' 823 791 183.35      
17 E' 654 629 21.90      
17 E' 654 629 21.90      
18 E' 169 162 4.86      
18 E' 169 162 4.86      
19 E" 3086 2967 0.00      
19 E" 3086 2967 0.00      
20 E" 1489 1431 0.00      
20 E" 1489 1431 0.00      
21 E" 635 610 0.00      
21 E" 635 610 0.00      
22 E" 30 29 0.00      
22 E" 30 29 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23644.6 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 22727.2 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/LANL2DZ
ABC
0.16207 0.16207 0.08487

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/LANL2DZ

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 1.985 0.000
C3 -1.719 -0.993 0.000
C4 1.719 -0.993 0.000
H5 -1.014 2.410 0.000
H6 -1.580 -2.083 0.000
H7 2.594 -0.327 0.000
H8 0.528 2.385 0.881
H9 0.528 2.385 -0.881
H10 -2.330 -0.735 0.881
H11 -2.330 -0.735 -0.881
H12 1.802 -1.650 0.881
H13 1.802 -1.650 -0.881

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.98531.98531.98532.61412.61412.61412.59702.59702.59702.59702.59702.5970
C21.98533.43863.43861.09894.36403.47461.10211.10213.68863.68864.15174.1517
C31.98533.43863.43863.47461.09894.36404.15174.15171.10211.10213.68863.6886
C41.98533.43863.43864.36403.47461.09893.68863.68864.15174.15171.10211.1021
H52.61411.09893.47464.36404.52784.52781.77571.77573.52123.52125.01815.0181
H62.61414.36401.09893.47464.52784.52785.01815.01811.77571.77573.52123.5212
H72.61413.47464.36401.09894.52784.52783.52123.52125.01815.01811.77571.7757
H82.59701.10214.15173.68861.77575.01813.52121.76184.23144.58354.23144.5835
H92.59701.10214.15173.68861.77575.01813.52121.76184.58354.23144.58354.2314
H102.59703.68861.10214.15173.52121.77575.01814.23144.58351.76184.23144.5835
H112.59703.68861.10214.15173.52121.77575.01814.58354.23141.76184.58354.2314
H122.59704.15173.68861.10215.01813.52121.77574.23144.58354.23144.58351.7618
H132.59704.15173.68861.10215.01813.52121.77574.58354.23144.58354.23141.7618

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 112.713 Al1 C2 H8 111.281
Al1 C2 H9 111.281 Al1 C3 H6 112.713
Al1 C3 H10 111.281 Al1 C3 H11 111.281
Al1 C4 H7 112.713 Al1 C4 H12 111.281
Al1 C4 H13 111.281 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.561 H5 C2 H9 107.561
H6 C3 H10 107.561 H6 C3 H11 107.561
H7 C4 H12 107.561 H7 C4 H13 107.561
H8 C2 H9 106.121 H10 C3 H11 106.121
H12 C4 H13 106.121
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/LANL2DZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 1.252      
2 C -1.100      
3 C -1.100      
4 C -1.100      
5 H 0.226      
6 H 0.226      
7 H 0.226      
8 H 0.228      
9 H 0.228      
10 H 0.228      
11 H 0.228      
12 H 0.228      
13 H 0.228      


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 -35.688 0.000 0.000
y 0.000 -35.688 0.000
z 0.000 0.000 -29.496
Traceless
 xyz
x -3.096 0.000 0.000
y 0.000 -3.096 0.000
z 0.000 0.000 6.193
Polar
3z2-r212.385
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 8.484 0.000 0.000
y 0.000 8.484 0.000
z 0.000 0.000 6.540


<r2> (average value of r2) Å2
<r2> 152.911
(<r2>)1/2 12.366