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

using model chemistry: B3LYP/SDD

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/SDD
 hartrees
Energy at 0K-362.184153
Energy at 298.15K-362.191850
HF Energy-362.184153
Nuclear repulsion energy149.988816
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/SDD
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' 3116 2996 0.00      
2 A' 3011 2895 0.00      
3 A' 1491 1433 0.00      
4 A' 1308 1258 0.00      
5 A' 667 641 0.00      
6 A' 519 499 0.00      
7 A" 3087 2967 76.40      
8 A" 1489 1432 19.72      
9 A" 809 778 142.36      
10 A" 187 180 8.49      
11 A" 53 51 0.20      
12 E' 3117 2997 46.05      
12 E' 3117 2997 46.06      
13 E' 3009 2893 27.60      
13 E' 3009 2893 27.60      
14 E' 1486 1428 5.70      
14 E' 1486 1428 5.71      
15 E' 1304 1253 85.53      
15 E' 1304 1253 85.55      
16 E' 833 801 180.10      
16 E' 833 801 180.11      
17 E' 661 635 19.22      
17 E' 661 635 19.22      
18 E' 174 167 4.75      
18 E' 174 167 4.75      
19 E" 3087 2967 0.00      
19 E" 3087 2967 0.00      
20 E" 1488 1431 0.00      
20 E" 1488 1431 0.00      
21 E" 646 621 0.00      
21 E" 646 621 0.00      
22 E" 28 27 0.00      
22 E" 28 27 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23701.3 cm-1
Scaled (by 0.9613) Zero Point Vibrational Energy (zpe) 22784.0 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/SDD
ABC
0.16353 0.16353 0.08566

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/SDD

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 1.975 0.000
C3 -1.710 -0.988 0.000
C4 1.710 -0.988 0.000
H5 -1.014 2.399 0.000
H6 -1.571 -2.078 0.000
H7 2.585 -0.322 0.000
H8 0.527 2.377 0.881
H9 0.527 2.377 -0.881
H10 -2.322 -0.732 0.881
H11 -2.322 -0.732 -0.881
H12 1.795 -1.645 0.881
H13 1.795 -1.645 -0.881

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.97501.97501.97502.60452.60452.60452.58932.58932.58932.58932.58932.5893
C21.97503.42083.42081.09894.34633.45751.10221.10223.67403.67404.13564.1356
C31.97503.42083.42083.45751.09894.34634.13564.13561.10221.10223.67403.6740
C41.97503.42083.42084.34633.45751.09893.67403.67404.13564.13561.10221.1022
H52.60451.09893.45754.34634.51114.51111.77471.77473.50623.50625.00215.0021
H62.60454.34631.09893.45754.51114.51115.00215.00211.77471.77473.50623.5062
H72.60453.45754.34631.09894.51114.51113.50623.50625.00215.00211.77471.7747
H82.58931.10224.13563.67401.77475.00213.50621.76114.21754.57054.21754.5705
H92.58931.10224.13563.67401.77475.00213.50621.76114.57054.21754.57054.2175
H102.58933.67401.10224.13563.50621.77475.00214.21754.57051.76114.21754.5705
H112.58933.67401.10224.13563.50621.77475.00214.57054.21751.76114.57054.2175
H122.58934.13563.67401.10225.00213.50621.77474.21754.57054.21754.57051.7611
H132.58934.13563.67401.10225.00213.50621.77474.57054.21754.57054.21751.7611

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 112.698 Al1 C2 H8 111.408
Al1 C2 H9 111.408 Al1 C3 H6 112.698
Al1 C3 H10 111.408 Al1 C3 H11 111.408
Al1 C4 H7 112.698 Al1 C4 H12 111.408
Al1 C4 H13 111.408 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.466 H5 C2 H9 107.466
H6 C3 H10 107.466 H6 C3 H11 107.466
H7 C4 H12 107.466 H7 C4 H13 107.466
H8 C2 H9 106.054 H10 C3 H11 106.054
H12 C4 H13 106.054
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 1.398      
2 C -1.144      
3 C -1.144      
4 C -1.144      
5 H 0.224      
6 H 0.224      
7 H 0.224      
8 H 0.227      
9 H 0.227      
10 H 0.227      
11 H 0.227      
12 H 0.227      
13 H 0.227      


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 -37.311 0.000 0.000
y 0.000 -37.311 0.000
z 0.000 0.000 -31.043
Traceless
 xyz
x -3.134 0.000 0.000
y 0.000 -3.134 0.000
z 0.000 0.000 6.268
Polar
3z2-r212.536
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 8.814 0.000 0.000
y 0.000 8.814 0.000
z 0.000 0.000 6.564


<r2> (average value of r2) Å2
<r2> 152.790
(<r2>)1/2 12.361