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

using model chemistry: G3B3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3H 1A'
Energy calculated at G3B3
 hartrees
Energy at 0K-361.896392
Energy at 298.15K-361.886663
HF Energy-362.189256
Nuclear repulsion energy150.066450
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*
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' 3107 2984 0.00      
2 A' 3023 2903 0.00      
3 A' 1491 1431 0.00      
4 A' 1283 1232 0.00      
5 A' 604 580 0.00      
6 A' 508 488 0.00      
7 A" 3080 2958 56.18      
8 A" 1494 1434 4.10      
9 A" 748 718 116.29      
10 A" 183 176 5.65      
11 A" 44 42 0.05      
12 E' 3108 2985 32.83      
12 E' 3108 2985 32.85      
13 E' 3021 2901 11.31      
13 E' 3021 2901 11.31      
14 E' 1489 1430 0.67      
14 E' 1489 1430 0.67      
15 E' 1278 1227 33.26      
15 E' 1278 1227 33.25      
16 E' 781 750 163.61      
16 E' 781 750 163.60      
17 E' 640 615 13.17      
17 E' 640 615 13.17      
18 E' 170 163 3.06      
18 E' 170 163 3.06      
19 E" 3080 2957 0.00      
19 E" 3080 2957 0.00      
20 E" 1491 1432 0.00      
20 E" 1491 1432 0.00      
21 E" 577 554 0.00      
21 E" 577 554 0.00      
22 E" 20 20 0.00      
22 E" 20 20 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23436.0 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 22505.6 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 B3LYP/6-31G*
ABC
0.16359 0.16359 0.08566

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

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 -0.987 0.000
C4 1.710 -0.987 0.000
H5 -1.006 2.412 0.000
H6 -1.586 -2.077 0.000
H7 2.591 -0.335 0.000
H8 0.530 2.373 0.877
H9 0.530 2.373 -0.877
H10 -2.320 -0.728 0.877
H11 -2.320 -0.728 -0.877
H12 1.790 -1.646 0.877
H13 1.790 -1.646 -0.877

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.97481.97481.97482.61302.61302.61302.58502.58502.58502.58502.58502.5850
C21.97483.42043.42041.09654.35083.47131.09941.09943.66833.66834.13304.1330
C31.97483.42043.42043.47131.09654.35084.13304.13301.09941.09943.66833.6683
C41.97483.42043.42044.35083.47131.09653.66833.66834.13304.13301.09941.0994
H52.61301.09653.47134.35084.52584.52581.76891.76893.51463.51465.00495.0049
H62.61304.35081.09653.47134.52584.52585.00495.00491.76891.76893.51463.5146
H72.61303.47134.35081.09654.52584.52583.51463.51465.00495.00491.76891.7689
H82.58501.09944.13303.66831.76895.00493.51461.75394.21194.56254.21194.5625
H92.58501.09944.13303.66831.76895.00493.51461.75394.56254.21194.56254.2119
H102.58503.66831.09944.13303.51461.76895.00494.21194.56251.75394.21194.5625
H112.58503.66831.09944.13303.51461.76895.00494.56254.21191.75394.56254.2119
H122.58504.13303.66831.09945.00493.51461.76894.21194.56254.21194.56251.7539
H132.58504.13303.66831.09945.00493.51461.76894.56254.21194.56254.21191.7539

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 113.255 Al1 C2 H8 111.193
Al1 C2 H9 111.193 Al1 C3 H6 113.255
Al1 C3 H10 111.193 Al1 C3 H11 111.193
Al1 C4 H7 113.255 Al1 C4 H12 111.193
Al1 C4 H13 111.193 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.425 H5 C2 H9 107.425
H6 C3 H10 107.425 H6 C3 H11 107.425
H7 C4 H12 107.425 H7 C4 H13 107.425
H8 C2 H9 105.981 H10 C3 H11 105.981
H12 C4 H13 105.981
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 0.730      
2 C -0.715      
3 C -0.715      
4 C -0.715      
5 H 0.159      
6 H 0.159      
7 H 0.159      
8 H 0.156      
9 H 0.156      
10 H 0.156      
11 H 0.156      
12 H 0.156      
13 H 0.156      


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


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 152.308
(<r2>)1/2 12.341