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

using model chemistry: PBEPBE/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3H 1A'
Energy calculated at PBEPBE/cc-pVDZ
 hartrees
Energy at 0K-361.851083
Energy at 298.15K-361.858331
HF Energy-361.851083
Nuclear repulsion energy149.119548
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 PBEPBE/cc-pVDZ
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' 3060 3042 0.00      
2 A' 2955 2938 0.00      
3 A' 1375 1367 0.00      
4 A' 1164 1157 0.00      
5 A' 575 572 0.00      
6 A' 494 491 0.00      
7 A" 3028 3010 27.02      
8 A" 1379 1371 2.68      
9 A" 693 689 95.92      
10 A" 176 175 3.55      
11 A" 53 53 0.10      
12 E' 3060 3042 19.42      
12 E' 3060 3042 19.42      
13 E' 2954 2936 9.93      
13 E' 2954 2936 9.94      
14 E' 1372 1364 0.29      
14 E' 1372 1364 0.29      
15 E' 1160 1153 21.20      
15 E' 1160 1153 21.20      
16 E' 733 729 157.00      
16 E' 733 729 156.99      
17 E' 620 617 12.24      
17 E' 620 617 12.24      
18 E' 161 160 2.84      
18 E' 161 160 2.84      
19 E" 3028 3010 0.00      
19 E" 3028 3010 0.00      
20 E" 1376 1368 0.00      
20 E" 1376 1368 0.00      
21 E" 534 530 0.00      
21 E" 534 530 0.00      
22 E" 28 28 0.00      
22 E" 28 28 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 22500.2 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 22369.7 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 PBEPBE/cc-pVDZ
ABC
0.16190 0.16190 0.08482

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/cc-pVDZ

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 1.984 0.000
C3 -1.718 -0.992 0.000
C4 1.718 -0.992 0.000
H5 -1.013 2.435 0.000
H6 -1.602 -2.095 0.000
H7 2.616 -0.340 0.000
H8 0.545 2.379 0.887
H9 0.545 2.379 -0.887
H10 -2.332 -0.718 0.887
H11 -2.332 -0.718 -0.887
H12 1.788 -1.661 0.887
H13 1.788 -1.661 -0.887

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.98391.98391.98392.63752.63752.63752.59642.59642.59642.59642.59642.5964
C21.98393.43623.43621.10934.38253.49871.11301.11303.67763.67764.15554.1555
C31.98393.43623.43623.49871.10934.38254.15554.15551.11301.11303.67763.6776
C41.98393.43623.43624.38253.49871.10933.67763.67764.15554.15551.11301.1130
H52.63751.10933.49874.38254.56844.56841.79361.79363.53063.53065.04095.0409
H62.63754.38251.10933.49874.56844.56845.04095.04091.79361.79363.53063.5306
H72.63753.49874.38251.10934.56844.56843.53063.53065.04095.04091.79361.7936
H82.59641.11304.15553.67761.79365.04093.53061.77324.22674.58364.22674.5836
H92.59641.11304.15553.67761.79365.04093.53061.77324.58364.22674.58364.2267
H102.59643.67761.11304.15553.53061.79365.04094.22674.58361.77324.22674.5836
H112.59643.67761.11304.15553.53061.79365.04094.58364.22671.77324.58364.2267
H122.59644.15553.67761.11305.04093.53061.79364.22674.58364.22674.58361.7732
H132.59644.15553.67761.11305.04093.53061.79364.58364.22674.58364.22671.7732

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 113.997 Al1 C2 H8 110.777
Al1 C2 H9 110.777 Al1 C3 H6 113.997
Al1 C3 H10 110.777 Al1 C3 H11 110.777
Al1 C4 H7 113.997 Al1 C4 H12 110.777
Al1 C4 H13 110.777 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.630 H5 C2 H9 107.630
H6 C3 H10 107.630 H6 C3 H11 107.630
H7 C4 H12 107.630 H7 C4 H13 107.630
H8 C2 H9 105.617 H10 C3 H11 105.617
H12 C4 H13 105.617
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 0.356      
2 C -0.255      
3 C -0.255      
4 C -0.255      
5 H 0.043      
6 H 0.043      
7 H 0.043      
8 H 0.047      
9 H 0.047      
10 H 0.047      
11 H 0.047      
12 H 0.047      
13 H 0.047      


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 -36.197 0.000 0.000
y 0.000 -36.197 0.000
z 0.000 0.000 -31.728
Traceless
 xyz
x -2.235 0.000 0.000
y 0.000 -2.235 0.000
z 0.000 0.000 4.469
Polar
3z2-r28.939
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 9.851 0.000 0.000
y 0.000 9.850 0.000
z 0.000 0.000 7.366


<r2> (average value of r2) Å2
<r2> 153.841
(<r2>)1/2 12.403