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

using model chemistry: B3LYP/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3H 1A'
Energy calculated at B3LYP/6-31G(2df,p)
 hartrees
Energy at 0K-362.208711
Energy at 298.15K-362.216074
HF Energy-362.208711
Nuclear repulsion energy150.672817
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 B3LYP/6-31G(2df,p)
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' 3095 2987 0.00      
2 A' 3011 2906 0.00      
3 A' 1453 1402 0.00      
4 A' 1242 1198 0.00      
5 A' 587 567 0.00      
6 A' 516 498 0.00      
7 A" 3069 2961 43.39      
8 A" 1459 1408 1.43      
9 A" 721 695 99.16      
10 A" 184 178 5.16      
11 A" 45 44 0.00      
12 E' 3096 2987 27.98      
12 E' 3096 2987 28.00      
13 E' 3010 2904 8.67      
13 E' 3010 2904 8.67      
14 E' 1452 1401 0.33      
14 E' 1452 1401 0.33      
15 E' 1238 1195 22.81      
15 E' 1238 1195 22.81      
16 E' 757 731 158.88      
16 E' 757 731 158.89      
17 E' 641 619 9.46      
17 E' 641 619 9.45      
18 E' 171 165 2.97      
18 E' 171 165 2.97      
19 E" 3068 2961 0.00      
19 E" 3068 2961 0.00      
20 E" 1456 1405 0.00      
20 E" 1456 1405 0.00      
21 E" 555 536 0.00      
21 E" 555 536 0.00      
22 E" 15 15 0.00      
22 E" 15 15 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23150.7 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 22340.4 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 B3LYP/6-31G(2df,p)
ABC
0.16511 0.16511 0.08648

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 1.965 0.000
C3 -1.701 -0.982 0.000
C4 1.701 -0.982 0.000
H5 -1.002 2.407 0.000
H6 -1.583 -2.071 0.000
H7 2.585 -0.335 0.000
H8 0.531 2.362 0.875
H9 0.531 2.362 -0.875
H10 -2.311 -0.721 0.875
H11 -2.311 -0.721 -0.875
H12 1.780 -1.641 0.875
H13 1.780 -1.641 -0.875

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.96461.96461.96462.60702.60702.60702.57422.57422.57422.57422.57422.5742
C21.96463.40283.40281.09534.33523.46041.09821.09823.64943.64944.11514.1151
C31.96463.40283.40283.46041.09534.33524.11514.11511.09821.09823.64943.6494
C41.96463.40283.40284.33523.46041.09533.64943.64944.11514.11511.09821.0982
H52.60701.09533.46044.33524.51544.51541.76621.76623.50143.50144.98884.9888
H62.60704.33521.09533.46044.51544.51544.98884.98881.76621.76623.50143.5014
H72.60703.46044.33521.09534.51544.51543.50143.50144.98884.98881.76621.7662
H82.57421.09824.11513.64941.76624.98883.50141.75054.19304.54374.19304.5437
H92.57421.09824.11513.64941.76624.98883.50141.75054.54374.19304.54374.1930
H102.57423.64941.09824.11513.50141.76624.98884.19304.54371.75054.19304.5437
H112.57423.64941.09824.11513.50141.76624.98884.54374.19301.75054.54374.1930
H122.57424.11513.64941.09824.98883.50141.76624.19304.54374.19304.54371.7505
H132.57424.11513.64941.09824.98883.50141.76624.54374.19304.54374.19301.7505

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 113.803 Al1 C2 H8 111.201
Al1 C2 H9 111.201 Al1 C3 H6 113.803
Al1 C3 H10 111.201 Al1 C3 H11 111.201
Al1 C4 H7 113.803 Al1 C4 H12 111.201
Al1 C4 H13 111.201 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.259 H5 C2 H9 107.259
H6 C3 H10 107.259 H6 C3 H11 107.259
H7 C4 H12 107.259 H7 C4 H13 107.259
H8 C2 H9 105.682 H10 C3 H11 105.682
H12 C4 H13 105.682
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 0.620      
2 C -0.583      
3 C -0.583      
4 C -0.583      
5 H 0.127      
6 H 0.127      
7 H 0.127      
8 H 0.125      
9 H 0.125      
10 H 0.125      
11 H 0.125      
12 H 0.125      
13 H 0.125      


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 -35.981 0.000 0.000
y 0.000 -35.981 0.000
z 0.000 0.000 -31.085
Traceless
 xyz
x -2.448 0.000 0.000
y 0.000 -2.448 0.000
z 0.000 0.000 4.896
Polar
3z2-r29.792
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 9.039 0.000 0.000
y 0.000 9.039 0.000
z 0.000 0.000 7.114


<r2> (average value of r2) Å2
<r2> 151.076
(<r2>)1/2 12.291