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

using model chemistry: wB97X-D/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3H 1A'
Energy calculated at wB97X-D/TZVP
 hartrees
Energy at 0K-362.188911
Energy at 298.15K 
HF Energy-362.188911
Nuclear repulsion energy150.685262
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 wB97X-D/TZVP
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' 3125 2985 0.00      
2 A' 3036 2900 0.00      
3 A' 1454 1389 0.00      
4 A' 1248 1192 0.00      
5 A' 594 567 0.00      
6 A' 525 501 0.00      
7 A" 3105 2965 44.31      
8 A" 1466 1400 11.55      
9 A" 728 695 99.03      
10 A" 183 174 8.85      
11 A" 96i 91i 0.00      
12 E' 3126 2985 26.18      
12 E' 3126 2985 26.21      
13 E' 3035 2899 12.75      
13 E' 3035 2899 12.70      
14 E' 1452 1387 2.61      
14 E' 1452 1387 2.60      
15 E' 1246 1190 61.91      
15 E' 1246 1190 61.89      
16 E' 766 732 166.53      
16 E' 766 732 166.42      
17 E' 651 621 10.80      
17 E' 651 621 10.78      
18 E' 163 155 4.79      
18 E' 163 155 4.78      
19 E" 3105 2965 0.00      
19 E" 3105 2965 0.00      
20 E" 1465 1399 0.00      
20 E" 1465 1399 0.00      
21 E" 564 539 0.00      
21 E" 564 539 0.00      
22 E" 97i 93i 0.00      
22 E" 97i 93i 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23159.0 cm-1
Scaled (by 0.955) Zero Point Vibrational Energy (zpe) 22116.9 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 wB97X-D/TZVP
ABC
0.16496 0.16496 0.08639

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/TZVP

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 1.967 0.000
C3 -1.704 -0.984 0.000
C4 1.704 -0.984 0.000
H5 -1.005 2.396 0.000
H6 -1.573 -2.068 0.000
H7 2.578 -0.328 0.000
H8 0.528 2.361 0.875
H9 0.528 2.361 -0.875
H10 -2.309 -0.723 0.875
H11 -2.309 -0.723 -0.875
H12 1.781 -1.638 0.875
H13 1.781 -1.638 -0.875

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.96721.96721.96722.59832.59832.59832.57262.57262.57262.57262.57262.5726
C21.96723.40733.40731.09264.33113.45121.09501.09503.65163.65164.11484.1148
C31.96723.40733.40733.45121.09264.33114.11484.11481.09501.09503.65163.6516
C41.96723.40733.40734.33113.45121.09263.65163.65164.11484.11481.09501.0950
H52.59831.09263.45124.33114.50034.50031.76521.76523.49233.49234.97964.9796
H62.59834.33111.09263.45124.50034.50034.97964.97961.76521.76523.49233.4923
H72.59833.45124.33111.09264.50034.50033.49233.49234.97964.97961.76521.7652
H82.57261.09504.11483.65161.76524.97963.49231.74964.19044.54104.19044.5410
H92.57261.09504.11483.65161.76524.97963.49231.74964.54104.19044.54104.1904
H102.57263.65161.09504.11483.49231.76524.97964.19044.54101.74964.19044.5410
H112.57263.65161.09504.11483.49231.76524.97964.54104.19041.74964.54104.1904
H122.57264.11483.65161.09504.97963.49231.76524.19044.54104.19044.54101.7496
H132.57264.11483.65161.09504.97963.49231.76524.54104.19044.54104.19041.7496

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 113.113 Al1 C2 H8 111.078
Al1 C2 H9 111.078 Al1 C3 H6 113.113
Al1 C3 H10 111.078 Al1 C3 H11 111.078
Al1 C4 H7 113.113 Al1 C4 H12 111.078
Al1 C4 H13 111.078 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.592 H5 C2 H9 107.592
H6 C3 H10 107.592 H6 C3 H11 107.592
H7 C4 H12 107.592 H7 C4 H13 107.592
H8 C2 H9 106.049 H10 C3 H11 106.049
H12 C4 H13 106.049
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 0.756      
2 C -0.639      
3 C -0.639      
4 C -0.639      
5 H 0.131      
6 H 0.131      
7 H 0.131      
8 H 0.128      
9 H 0.128      
10 H 0.128      
11 H 0.128      
12 H 0.128      
13 H 0.128      


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 -37.357 0.000 0.000
y 0.000 -37.357 0.000
z 0.000 0.000 -31.232
Traceless
 xyz
x -3.063 0.000 0.000
y 0.000 -3.063 0.000
z 0.000 0.000 6.126
Polar
3z2-r212.251
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 9.603 0.001 0.000
y 0.001 9.601 0.000
z 0.000 0.000 7.402


<r2> (average value of r2) Å2
<r2> 151.680
(<r2>)1/2 12.316