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

using model chemistry: PBEPBE/6-311G*

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/6-311G*
 hartrees
Energy at 0K-361.884379
Energy at 298.15K-361.891729
HF Energy-361.884379
Nuclear repulsion energy149.652660
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/6-311G*
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' 3033 3002 0.00      
2 A' 2948 2917 0.00      
3 A' 1433 1418 0.00      
4 A' 1224 1211 0.00      
5 A' 585 579 0.00      
6 A' 503 498 0.00      
7 A" 3007 2976 48.51      
8 A" 1435 1420 11.71      
9 A" 722 714 105.99      
10 A" 177 175 6.02      
11 A" 54 54 0.04      
12 E' 3034 3002 31.66      
12 E' 3034 3002 31.67      
13 E' 2946 2915 14.39      
13 E' 2946 2915 14.39      
14 E' 1430 1415 2.14      
14 E' 1430 1415 2.15      
15 E' 1221 1208 46.06      
15 E' 1221 1208 46.06      
16 E' 754 746 161.36      
16 E' 754 746 161.36      
17 E' 631 624 12.83      
17 E' 631 624 12.84      
18 E' 161 160 3.58      
18 E' 161 160 3.58      
19 E" 3007 2975 0.00      
19 E" 3007 2975 0.00      
20 E" 1432 1418 0.00      
20 E" 1432 1418 0.00      
21 E" 559 553 0.00      
21 E" 559 553 0.00      
22 E" 27 27 0.00      
22 E" 27 27 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 22761.2 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 22524.5 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/6-311G*
ABC
0.16284 0.16284 0.08526

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311G*

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 1.978 0.000
C3 -1.713 -0.989 0.000
C4 1.713 -0.989 0.000
H5 -1.008 2.422 0.000
H6 -1.594 -2.084 0.000
H7 2.602 -0.338 0.000
H8 0.533 2.384 0.878
H9 0.533 2.384 -0.878
H10 -2.331 -0.731 0.878
H11 -2.331 -0.731 -0.878
H12 1.798 -1.654 0.878
H13 1.798 -1.654 -0.878

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.97771.97771.97772.62392.62392.62392.59632.59632.59632.59632.59632.5963
C21.97773.42543.42541.10204.36353.48321.10491.10493.67993.67994.14654.1465
C31.97773.42543.42543.48321.10204.36354.14654.14651.10481.10483.67993.6799
C41.97773.42543.42544.36353.48321.10203.67993.67994.14654.14651.10491.1049
H52.62391.10203.48324.36354.54464.54461.77421.77423.53043.53045.02635.0263
H62.62394.36351.10203.48324.54464.54465.02635.02631.77421.77423.53043.5304
H72.62393.48324.36351.10204.54464.54463.53043.53045.02635.02631.77421.7742
H82.59631.10494.14653.67991.77425.02633.53041.75634.23184.58184.23184.5818
H92.59631.10494.14653.67991.77425.02633.53041.75634.58184.23184.58184.2318
H102.59633.67991.10484.14653.53041.77425.02634.23184.58181.75634.23184.5818
H112.59633.67991.10484.14653.53041.77425.02634.58184.23181.75634.58184.2318
H122.59634.14653.67991.10495.02633.53041.77424.23184.58184.23184.58181.7563
H132.59634.14653.67991.10495.02633.53041.77424.58184.23184.58184.23181.7563

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 113.803 Al1 C2 H8 111.601
Al1 C2 H9 111.601 Al1 C3 H6 113.803
Al1 C3 H10 111.601 Al1 C3 H11 111.601
Al1 C4 H7 113.803 Al1 C4 H12 111.601
Al1 C4 H13 111.601 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.026 H5 C2 H9 107.026
H6 C3 H10 107.026 H6 C3 H11 107.026
H7 C4 H12 107.026 H7 C4 H13 107.026
H8 C2 H9 105.278 H10 C3 H11 105.278
H12 C4 H13 105.278
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 1.067      
2 C -1.067      
3 C -1.067      
4 C -1.067      
5 H 0.242      
6 H 0.242      
7 H 0.242      
8 H 0.235      
9 H 0.235      
10 H 0.235      
11 H 0.235      
12 H 0.235      
13 H 0.235      


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 -37.174 0.000 0.000
y 0.000 -37.174 0.000
z 0.000 0.000 -31.722
Traceless
 xyz
x -2.726 0.000 0.000
y 0.000 -2.726 0.000
z 0.000 0.000 5.453
Polar
3z2-r210.905
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 9.856 0.000 0.000
y 0.000 9.855 0.000
z 0.000 0.000 7.284


<r2> (average value of r2) Å2
<r2> 153.583
(<r2>)1/2 12.393