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

using model chemistry: BLYP/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 BLYP/6-31G(2df,p)
 hartrees
Energy at 0K-362.089915
Energy at 298.15K-362.097193
HF Energy-362.089915
Nuclear repulsion energy149.713043
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 BLYP/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' 3017 3000 0.00      
2 A' 2938 2922 0.00      
3 A' 1419 1411 0.00      
4 A' 1210 1203 0.00      
5 A' 576 573 0.00      
6 A' 499 496 0.00      
7 A" 2990 2973 47.10      
8 A" 1425 1417 0.73      
9 A" 707 703 91.47      
10 A" 179 178 3.85      
11 A" 47 46 0.00      
12 E' 3017 3001 31.56      
12 E' 3017 3001 31.58      
13 E' 2936 2920 10.63      
13 E' 2936 2920 10.63      
14 E' 1418 1410 0.47      
14 E' 1418 1410 0.47      
15 E' 1205 1199 14.16      
15 E' 1205 1199 14.15      
16 E' 740 736 151.20      
16 E' 740 736 151.21      
17 E' 623 620 11.21      
17 E' 623 620 11.21      
18 E' 169 168 2.53      
18 E' 169 168 2.54      
19 E" 2990 2973 0.00      
19 E" 2990 2973 0.00      
20 E" 1421 1413 0.00      
20 E" 1421 1413 0.00      
21 E" 544 541 0.00      
21 E" 544 541 0.00      
22 E" 20 20 0.00      
22 E" 20 20 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 22584.8 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 22460.6 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 BLYP/6-31G(2df,p)
ABC
0.16301 0.16301 0.08537

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/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 1.977 0.000
C3 -1.712 -0.988 0.000
C4 1.712 -0.988 0.000
H5 -1.007 2.424 0.000
H6 -1.596 -2.085 0.000
H7 2.603 -0.340 0.000
H8 0.535 2.378 0.880
H9 0.535 2.378 -0.880
H10 -2.327 -0.726 0.880
H11 -2.327 -0.726 -0.880
H12 1.792 -1.652 0.880
H13 1.792 -1.652 -0.880

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.97691.97691.97692.62512.62512.62512.59142.59142.59142.59142.59142.5914
C21.97693.42423.42421.10224.36373.48461.10521.10523.67353.67354.14204.1420
C31.97693.42423.42423.48461.10224.36374.14204.14201.10521.10523.67353.6735
C41.97693.42423.42424.36373.48461.10223.67353.67354.14204.14201.10521.1052
H52.62511.10223.48464.36374.54694.54691.77621.77623.52683.52685.02275.0227
H62.62514.36371.10223.48464.54694.54695.02275.02271.77621.77623.52683.5268
H72.62513.48464.36371.10224.54694.54693.52683.52685.02275.02271.77621.7762
H82.59141.10524.14203.67351.77625.02273.52681.76044.22174.57404.22174.5740
H92.59141.10524.14203.67351.77625.02273.52681.76044.57404.22174.57404.2217
H102.59143.67351.10524.14203.52681.77625.02274.22174.57401.76044.22174.5740
H112.59143.67351.10524.14203.52681.77625.02274.57404.22171.76044.57404.2217
H122.59144.14203.67351.10525.02273.52681.77624.22174.57404.22174.57401.7604
H132.59144.14203.67351.10525.02273.52681.77624.57404.22174.57404.22171.7604

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 113.936 Al1 C2 H8 111.278
Al1 C2 H9 111.278 Al1 C3 H6 113.936
Al1 C3 H10 111.278 Al1 C3 H11 111.278
Al1 C4 H7 113.936 Al1 C4 H12 111.278
Al1 C4 H13 111.278 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.154 H5 C2 H9 107.154
H6 C3 H10 107.154 H6 C3 H11 107.154
H7 C4 H12 107.154 H7 C4 H13 107.154
H8 C2 H9 105.577 H10 C3 H11 105.577
H12 C4 H13 105.577
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 0.587      
2 C -0.532      
3 C -0.532      
4 C -0.532      
5 H 0.114      
6 H 0.114      
7 H 0.114      
8 H 0.112      
9 H 0.112      
10 H 0.112      
11 H 0.112      
12 H 0.112      
13 H 0.112      


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 -35.963 0.000 0.000
y 0.000 -35.963 0.000
z 0.000 0.000 -31.447
Traceless
 xyz
x -2.258 0.000 0.000
y 0.000 -2.258 0.000
z 0.000 0.000 4.516
Polar
3z2-r29.031
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 9.450 0.000 0.000
y 0.000 9.450 0.000
z 0.000 0.000 7.338


<r2> (average value of r2) Å2
<r2> 152.839
(<r2>)1/2 12.363