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

using model chemistry: B1B95/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3H 1A'
Energy calculated at B1B95/6-31G
 hartrees
Energy at 0K-362.065133
Energy at 298.15K-362.072738
HF Energy-362.065133
Nuclear repulsion energy149.991686
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 B1B95/6-31G
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' 3155 3009 0.00      
2 A' 3045 2904 0.00      
3 A' 1500 1431 0.00      
4 A' 1305 1245 0.00      
5 A' 658 627 0.00      
6 A' 515 491 0.00      
7 A" 3126 2982 47.30      
8 A" 1501 1432 14.31      
9 A" 805 768 139.17      
10 A" 185 176 6.60      
11 A" 42 40 0.15      
12 E' 3156 3009 29.53      
12 E' 3156 3009 29.55      
13 E' 3043 2902 13.53      
13 E' 3043 2902 13.51      
14 E' 1497 1428 4.24      
14 E' 1497 1428 4.24      
15 E' 1301 1240 64.34      
15 E' 1301 1240 64.27      
16 E' 826 788 168.45      
16 E' 826 788 168.45      
17 E' 662 632 13.98      
17 E' 662 632 13.98      
18 E' 165 158 3.61      
18 E' 165 158 3.61      
19 E" 3126 2982 0.00      
19 E" 3126 2982 0.00      
20 E" 1500 1431 0.00      
20 E" 1500 1431 0.00      
21 E" 642 612 0.00      
21 E" 642 612 0.00      
22 E" 18 17 0.00      
22 E" 18 17 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23856.2 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 22751.6 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 B1B95/6-31G
ABC
0.16326 0.16326 0.08550

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 1.979 0.000
C3 -1.714 -0.990 0.000
C4 1.714 -0.990 0.000
H5 -1.012 2.396 0.000
H6 -1.569 -2.074 0.000
H7 2.581 -0.322 0.000
H8 0.527 2.371 0.880
H9 0.527 2.371 -0.880
H10 -2.317 -0.729 0.880
H11 -2.317 -0.729 -0.880
H12 1.789 -1.642 0.880
H13 1.789 -1.642 -0.880

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.97931.97931.97932.60122.60122.60122.58292.58292.58292.58292.58292.5829
C21.97933.42833.42831.09434.34693.45821.09761.09763.67073.67074.13384.1338
C31.97933.42833.42833.45821.09434.34694.13384.13381.09761.09763.67073.6707
C41.97933.42833.42834.34693.45821.09433.67073.67074.13384.13381.09761.0976
H52.60121.09433.45824.34694.50554.50551.77271.77273.49903.49904.99284.9928
H62.60124.34691.09433.45824.50554.50554.99284.99281.77271.77273.49903.4990
H72.60123.45824.34691.09434.50554.50553.49903.49904.99284.99281.77271.7727
H82.58291.09764.13383.67071.77274.99283.49901.75904.20644.55944.20644.5594
H92.58291.09764.13383.67071.77274.99283.49901.75904.55944.20644.55944.2064
H102.58293.67071.09764.13383.49901.77274.99284.20644.55941.75904.20644.5594
H112.58293.67071.09764.13383.49901.77274.99284.55944.20641.75904.55944.2064
H122.58294.13383.67071.09764.99283.49901.77274.20644.55944.20644.55941.7590
H132.58294.13383.67071.09764.99283.49901.77274.55944.20644.55944.20641.7590

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 112.405 Al1 C2 H8 110.890
Al1 C2 H9 110.890 Al1 C3 H6 112.405
Al1 C3 H10 110.890 Al1 C3 H11 110.890
Al1 C4 H7 112.405 Al1 C4 H12 110.890
Al1 C4 H13 110.890 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.948 H5 C2 H9 107.948
H6 C3 H10 107.948 H6 C3 H11 107.948
H7 C4 H12 107.948 H7 C4 H13 107.948
H8 C2 H9 106.516 H10 C3 H11 106.516
H12 C4 H13 106.516
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 0.994      
2 C -0.849      
3 C -0.849      
4 C -0.849      
5 H 0.173      
6 H 0.173      
7 H 0.173      
8 H 0.172      
9 H 0.172      
10 H 0.172      
11 H 0.172      
12 H 0.172      
13 H 0.172      


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 -36.313 0.000 0.000
y 0.000 -36.313 0.000
z 0.000 0.000 -31.044
Traceless
 xyz
x -2.635 0.000 0.000
y 0.000 -2.635 0.000
z 0.000 0.000 5.269
Polar
3z2-r210.538
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 8.612 -0.000 0.000
y -0.000 8.611 0.000
z 0.000 0.000 6.513


<r2> (average value of r2) Å2
<r2> 152.429
(<r2>)1/2 12.346