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

using model chemistry: HF/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 HF/6-311G*
 hartrees
Energy at 0K-360.794529
Energy at 298.15K-360.802246
HF Energy-360.794529
Nuclear repulsion energy150.327307
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/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3207 2900 0.00      
2 A' 3136 2836 0.00      
3 A' 1588 1436 0.00      
4 A' 1383 1251 0.00      
5 A' 642 581 0.00      
6 A' 533 482 0.00      
7 A" 3179 2875 109.00      
8 A" 1591 1439 8.99      
9 A" 782 707 113.25      
10 A" 196 177 15.18      
11 A" 52 47 0.02      
12 E' 3208 2901 57.41      
12 E' 3208 2901 57.41      
13 E' 3133 2834 30.84      
13 E' 3133 2834 30.84      
14 E' 1586 1434 1.47      
14 E' 1586 1434 1.47      
15 E' 1379 1247 47.41      
15 E' 1379 1247 47.41      
16 E' 817 738 160.46      
16 E' 817 738 160.46      
17 E' 669 605 23.01      
17 E' 669 605 23.01      
18 E' 175 158 6.47      
18 E' 175 158 6.47      
19 E" 3179 2875 0.00      
19 E" 3179 2875 0.00      
20 E" 1590 1438 0.00      
20 E" 1590 1438 0.00      
21 E" 611 553 0.00      
21 E" 611 553 0.00      
22 E" 30 27 0.00      
22 E" 30 27 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24520.1 cm-1
Scaled (by 0.9044) Zero Point Vibrational Energy (zpe) 22176.0 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/6-311G*
ABC
0.16371 0.16371 0.08565

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/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 1.975 0.000
C3 -1.711 -0.988 0.000
C4 1.711 -0.988 0.000
H5 -0.996 2.410 0.000
H6 -1.589 -2.068 0.000
H7 2.585 -0.342 0.000
H8 0.523 2.377 0.868
H9 0.523 2.377 -0.868
H10 -2.320 -0.735 0.868
H11 -2.320 -0.735 -0.868
H12 1.797 -1.641 0.868
H13 1.797 -1.641 -0.868

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.97531.97531.97532.60782.60782.60782.58362.58362.58362.58362.58362.5836
C21.97533.42133.42131.08714.34413.47181.09001.09003.67183.67184.13044.1304
C31.97533.42133.42133.47181.08714.34414.13044.13041.09001.09003.67183.6718
C41.97533.42133.42134.34413.47181.08713.67183.67184.13044.13041.09001.0900
H52.60781.08713.47184.34414.51684.51681.75011.75013.52113.52114.99664.9966
H62.60784.34411.08713.47184.51684.51684.99664.99661.75011.75013.52113.5211
H72.60783.47184.34411.08714.51684.51683.52113.52114.99664.99661.75011.7501
H82.58361.09004.13043.67181.75014.99663.52111.73624.21474.55844.21474.5584
H92.58361.09004.13043.67181.75014.99663.52111.73624.55844.21474.55844.2147
H102.58363.67181.09004.13043.52111.75014.99664.21474.55841.73624.21474.5584
H112.58363.67181.09004.13043.52111.75014.99664.55844.21471.73624.55844.2147
H122.58364.13043.67181.09004.99663.52111.75014.21474.55844.21474.55841.7362
H132.58364.13043.67181.09004.99663.52111.75014.55844.21474.55844.21471.7362

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 113.567 Al1 C2 H8 111.602
Al1 C2 H9 111.602 Al1 C3 H6 113.567
Al1 C3 H10 111.602 Al1 C3 H11 111.602
Al1 C4 H7 113.567 Al1 C4 H12 111.602
Al1 C4 H13 111.602 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.006 H5 C2 H9 107.006
H6 C3 H10 107.006 H6 C3 H11 107.006
H7 C4 H12 107.006 H7 C4 H13 107.006
H8 C2 H9 105.589 H10 C3 H11 105.589
H12 C4 H13 105.589
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 1.271      
2 C -1.103      
3 C -1.103      
4 C -1.103      
5 H 0.231      
6 H 0.231      
7 H 0.231      
8 H 0.224      
9 H 0.224      
10 H 0.224      
11 H 0.224      
12 H 0.224      
13 H 0.224      


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 -38.556 0.000 0.000
y 0.000 -38.556 0.000
z 0.000 0.000 -31.198
Traceless
 xyz
x -3.679 0.000 0.000
y 0.000 -3.679 0.000
z 0.000 0.000 7.358
Polar
3z2-r214.716
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 8.576 0.000 0.000
y 0.000 8.576 0.000
z 0.000 0.000 6.659


<r2> (average value of r2) Å2
<r2> 153.232
(<r2>)1/2 12.379