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

using model chemistry: HF/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-360.830917
Energy at 298.15K-360.838622
HF Energy-360.830917
Nuclear repulsion energy150.624532
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/aug-cc-pVTZ
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' 3197 2911 0.00      
2 A' 3121 2842 0.00      
3 A' 1562 1422 0.00      
4 A' 1341 1221 0.00      
5 A' 634 577 0.00      
6 A' 534 486 0.00      
7 A" 3169 2885 85.81      
8 A" 1567 1427 2.59      
9 A" 762 694 97.53      
10 A" 196 179 12.67      
11 A" 53 48 0.14      
12 E' 3198 2912 47.76      
12 E' 3198 2912 47.76      
13 E' 3119 2840 22.73      
13 E' 3119 2840 22.73      
14 E' 1561 1421 0.30      
14 E' 1561 1421 0.30      
15 E' 1338 1218 38.90      
15 E' 1338 1218 38.90      
16 E' 801 729 154.81      
16 E' 801 729 154.81      
17 E' 668 608 23.31      
17 E' 668 608 23.31      
18 E' 178 162 6.52      
18 E' 178 162 6.52      
19 E" 3169 2885 0.00      
19 E" 3169 2885 0.00      
20 E" 1566 1426 0.00      
20 E" 1566 1426 0.00      
21 E" 596 543 0.00      
21 E" 596 543 0.00      
22 E" 30 27 0.00      
22 E" 30 27 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24291.7 cm-1
Scaled (by 0.9104) Zero Point Vibrational Energy (zpe) 22115.2 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 HF/aug-cc-pVTZ
ABC
0.16437 0.16437 0.08603

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/aug-cc-pVTZ

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 1.973 0.000
C3 -1.709 -0.986 0.000
C4 1.709 -0.986 0.000
H5 -0.997 2.402 0.000
H6 -1.582 -2.064 0.000
H7 2.579 -0.338 0.000
H8 0.526 2.361 0.870
H9 0.526 2.361 -0.870
H10 -2.308 -0.725 0.870
H11 -2.308 -0.725 -0.870
H12 1.782 -1.636 0.870
H13 1.782 -1.636 -0.870

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.97291.97291.97292.60102.60102.60102.57062.57062.57062.57062.57062.5706
C21.97293.41713.41711.08524.33623.46291.08841.08843.65523.65524.11774.1177
C31.97293.41713.41713.46291.08524.33624.11774.11771.08841.08843.65523.6552
C41.97293.41713.41714.33623.46291.08523.65523.65524.11774.11771.08841.0884
H52.60101.08523.46294.33624.50504.50501.75421.75423.50093.50094.97854.9785
H62.60104.33621.08523.46294.50504.50504.97854.97851.75421.75423.50093.5009
H72.60103.46294.33621.08524.50504.50503.50093.50094.97854.97851.75421.7542
H82.57061.08844.11773.65521.75424.97853.50091.74044.18954.53674.18954.5367
H92.57061.08844.11773.65521.75424.97853.50091.74044.53674.18954.53674.1895
H102.57063.65521.08844.11773.50091.75424.97854.18954.53671.74044.18954.5367
H112.57063.65521.08844.11773.50091.75424.97854.53674.18951.74044.53674.1895
H122.57064.11773.65521.08844.97853.50091.75424.18954.53674.18954.53671.7404
H132.57064.11773.65521.08844.97853.50091.75424.53674.18954.53674.18951.7404

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 113.317 Al1 C2 H8 110.889
Al1 C2 H9 110.889 Al1 C3 H6 113.317
Al1 C3 H10 110.889 Al1 C3 H11 110.889
Al1 C4 H7 113.317 Al1 C4 H12 110.889
Al1 C4 H13 110.889 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.620 H5 C2 H9 107.620
H6 C3 H10 107.620 H6 C3 H11 107.620
H7 C4 H12 107.620 H7 C4 H13 107.620
H8 C2 H9 106.173 H10 C3 H11 106.173
H12 C4 H13 106.173
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 0.243      
2 C -0.754      
3 C -0.754      
4 C -0.754      
5 H 0.301      
6 H 0.301      
7 H 0.301      
8 H 0.186      
9 H 0.186      
10 H 0.186      
11 H 0.186      
12 H 0.186      
13 H 0.186      


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 -38.253 0.000 0.000
y 0.000 -38.253 0.000
z 0.000 0.000 -31.201
Traceless
 xyz
x -3.526 0.000 0.000
y 0.000 -3.526 0.000
z 0.000 0.000 7.051
Polar
3z2-r214.103
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 9.724 0.000 0.000
y 0.000 9.724 0.000
z 0.000 0.000 7.681


<r2> (average value of r2) Å2
<r2> 152.428
(<r2>)1/2 12.346