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

using model chemistry: TPSSh/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 TPSSh/cc-pVTZ
 hartrees
Energy at 0K-362.265832
Energy at 298.15K-362.273253
HF Energy-362.265832
Nuclear repulsion energy150.299287
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 TPSSh/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' 3081 2984 0.00      
2 A' 2998 2903 0.00      
3 A' 1463 1417 0.00      
4 A' 1246 1206 0.00      
5 A' 594 575 0.00      
6 A' 513 497 0.00      
7 A" 3052 2956 53.83      
8 A" 1467 1420 1.73      
9 A" 717 694 87.87      
10 A" 180 175 7.30      
11 A" 49 48 0.01      
12 E' 3082 2984 34.53      
12 E' 3082 2984 34.50      
13 E' 2997 2902 15.60      
13 E' 2997 2902 15.62      
14 E' 1461 1415 0.26      
14 E' 1461 1415 0.25      
15 E' 1243 1203 24.83      
15 E' 1243 1203 24.87      
16 E' 758 734 155.46      
16 E' 758 734 155.45      
17 E' 641 621 16.73      
17 E' 641 621 16.74      
18 E' 167 161 4.41      
18 E' 167 161 4.41      
19 E" 3052 2955 0.00      
19 E" 3052 2955 0.00      
20 E" 1464 1418 0.00      
20 E" 1464 1418 0.00      
21 E" 557 539 0.00      
21 E" 557 539 0.00      
22 E" 26 25 0.00      
22 E" 26 25 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23127.4 cm-1
Scaled (by 0.9683) Zero Point Vibrational Energy (zpe) 22394.3 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 TPSSh/cc-pVTZ
ABC
0.16404 0.16404 0.08588

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/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 -0.987 0.000
C4 1.709 -0.987 0.000
H5 -1.004 2.406 0.000
H6 -1.582 -2.073 0.000
H7 2.586 -0.333 0.000
H8 0.529 2.369 0.875
H9 0.529 2.369 -0.875
H10 -2.316 -0.727 0.875
H11 -2.316 -0.727 -0.875
H12 1.788 -1.642 0.875
H13 1.788 -1.642 -0.875

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.97341.97341.97342.60742.60742.60742.58052.58052.58052.58052.58052.5805
C21.97343.41803.41801.09364.34443.46531.09641.09643.66363.66364.12734.1273
C31.97343.41803.41803.46531.09364.34444.12744.12741.09641.09643.66363.6636
C41.97343.41803.41804.34443.46531.09363.66363.66364.12744.12741.09641.0964
H52.60741.09363.46534.34444.51614.51611.76551.76553.50763.50764.99514.9951
H62.60744.34441.09363.46534.51614.51614.99514.99511.76551.76553.50763.5076
H72.60743.46534.34441.09364.51614.51613.50763.50764.99514.99511.76551.7655
H82.58051.09644.12743.66361.76554.99513.50761.75054.20454.55444.20454.5544
H92.58051.09644.12743.66361.76554.99513.50761.75054.55444.20454.55444.2045
H102.58053.66361.09644.12743.50761.76554.99514.20454.55441.75054.20454.5544
H112.58053.66361.09644.12743.50761.76554.99514.55444.20451.75054.55444.2045
H122.58054.12733.66361.09644.99513.50761.76554.20454.55444.20454.55441.7505
H132.58054.12733.66361.09644.99513.50761.76554.55444.20454.55444.20451.7505

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 113.314 Al1 C2 H8 111.166
Al1 C2 H9 111.166 Al1 C3 H6 113.314
Al1 C3 H10 111.166 Al1 C3 H11 111.166
Al1 C4 H7 113.314 Al1 C4 H12 111.166
Al1 C4 H13 111.166 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.446 H5 C2 H9 107.446
H6 C3 H10 107.446 H6 C3 H11 107.446
H7 C4 H12 107.446 H7 C4 H13 107.446
H8 C2 H9 105.931 H10 C3 H11 105.932
H12 C4 H13 105.932
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 0.451      
2 C -0.369      
3 C -0.369      
4 C -0.369      
5 H 0.077      
6 H 0.077      
7 H 0.077      
8 H 0.071      
9 H 0.071      
10 H 0.071      
11 H 0.071      
12 H 0.071      
13 H 0.071      


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


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 10.197 -0.000 0.000
y -0.000 10.193 0.000
z 0.000 0.000 7.890


<r2> (average value of r2) Å2
<r2> 152.404
(<r2>)1/2 12.345