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

using model chemistry: B97D3/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 B97D3/TZVP
 hartrees
Energy at 0K-362.145991
Energy at 298.15K 
HF Energy-362.145991
Nuclear repulsion energy149.549810
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 B97D3/TZVP
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' 3047 3003 0.00      
2 A' 2959 2917 0.00      
3 A' 1432 1412 0.00      
4 A' 1219 1201 0.00      
5 A' 592 584 0.00      
6 A' 498 491 0.00      
7 A" 3021 2977 56.01      
8 A" 1435 1414 6.93      
9 A" 717 707 89.02      
10 A" 173 171 7.42      
11 A" 18 18 0.00      
12 E' 3047 3003 35.40      
12 E' 3047 3003 35.36      
13 E' 2958 2915 17.80      
13 E' 2958 2915 17.81      
14 E' 1430 1409 1.32      
14 E' 1430 1409 1.32      
15 E' 1215 1198 40.45      
15 E' 1215 1198 40.41      
16 E' 751 740 153.05      
16 E' 751 740 153.08      
17 E' 626 617 20.59      
17 E' 626 617 20.59      
18 E' 165 163 4.62      
18 E' 165 163 4.62      
19 E" 3021 2977 0.00      
19 E" 3021 2977 0.00      
20 E" 1433 1412 0.00      
20 E" 1433 1412 0.00      
21 E" 558 550 0.00      
21 E" 558 550 0.00      
22 E" 35i 34i 0.00      
22 E" 35i 34i 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 22725.2 cm-1
Scaled (by 0.9856) Zero Point Vibrational Energy (zpe) 22397.9 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 B97D3/TZVP
ABC
0.16227 0.16227 0.08495

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/TZVP

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 1.984 0.000
C3 -1.718 -0.992 0.000
C4 1.718 -0.992 0.000
H5 -1.008 2.418 0.000
H6 -1.590 -2.082 0.000
H7 2.598 -0.336 0.000
H8 0.531 2.381 0.878
H9 0.531 2.381 -0.878
H10 -2.327 -0.730 0.878
H11 -2.327 -0.730 -0.878
H12 1.796 -1.650 0.878
H13 1.796 -1.650 -0.878

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.98421.98421.98422.61922.61922.61922.59222.59222.59222.59222.59222.5922
C21.98423.43683.43681.09704.36563.48301.09991.09993.68163.68164.14804.1480
C31.98423.43683.43683.48301.09704.36564.14804.14801.09991.09993.68163.6816
C41.98423.43683.43684.36563.48301.09703.68163.68164.14804.14801.09991.0999
H52.61921.09703.48304.36564.53674.53671.77211.77213.52423.52425.01795.0179
H62.61924.36561.09703.48304.53674.53675.01795.01791.77211.77213.52423.5242
H72.61923.48304.36561.09704.53674.53673.52423.52425.01795.01791.77211.7721
H82.59221.09994.14803.68161.77215.01793.52421.75554.22464.57484.22464.5748
H92.59221.09994.14803.68161.77215.01793.52421.75554.57484.22464.57484.2246
H102.59223.68161.09994.14803.52421.77215.01794.22464.57481.75554.22464.5748
H112.59223.68161.09994.14803.52421.77215.01794.57484.22461.75554.57484.2246
H122.59224.14803.68161.09995.01793.52421.77214.22464.57484.22464.57481.7555
H132.59224.14803.68161.09995.01793.52421.77214.57484.22464.57484.22461.7555

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 113.270 Al1 C2 H8 111.118
Al1 C2 H9 111.118 Al1 C3 H6 113.270
Al1 C3 H10 111.118 Al1 C3 H11 111.118
Al1 C4 H7 113.270 Al1 C4 H12 111.118
Al1 C4 H13 111.118 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.541 H5 C2 H9 107.541
H6 C3 H10 107.541 H6 C3 H11 107.541
H7 C4 H12 107.541 H7 C4 H13 107.541
H8 C2 H9 105.888 H10 C3 H11 105.888
H12 C4 H13 105.888
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B97D3/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 0.742      
2 C -0.613      
3 C -0.613      
4 C -0.613      
5 H 0.124      
6 H 0.124      
7 H 0.124      
8 H 0.121      
9 H 0.121      
10 H 0.121      
11 H 0.121      
12 H 0.121      
13 H 0.121      


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 -37.665 0.000 0.000
y 0.000 -37.665 0.000
z 0.000 0.000 -31.642
Traceless
 xyz
x -3.012 0.000 0.000
y 0.000 -3.012 0.000
z 0.000 0.000 6.023
Polar
3z2-r212.047
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 10.243 0.000 0.000
y 0.000 10.243 0.000
z 0.000 0.000 7.706


<r2> (average value of r2) Å2
<r2> 154.038
(<r2>)1/2 12.411