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

using model chemistry: BLYP/3-21G

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/3-21G
 hartrees
Energy at 0K-360.105967
Energy at 298.15K-360.113667
HF Energy-360.105967
Nuclear repulsion energy148.185341
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/3-21G
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' 3026 3009 0.00      
2 A' 2942 2925 0.00      
3 A' 1496 1488 0.00      
4 A' 1288 1281 0.00      
5 A' 650 646 0.00      
6 A' 500 497 0.00      
7 A" 2993 2977 52.47      
8 A" 1500 1492 5.89      
9 A" 792 787 132.92      
10 A" 182 181 5.07      
11 A" 64 63 0.12      
12 E' 3026 3009 31.43      
12 E' 3026 3009 31.44      
13 E' 2940 2923 11.96      
13 E' 2940 2923 11.96      
14 E' 1495 1486 1.51      
14 E' 1495 1486 1.51      
15 E' 1283 1276 36.56      
15 E' 1283 1276 36.56      
16 E' 810 806 160.97      
16 E' 810 806 160.96      
17 E' 646 642 13.24      
17 E' 646 642 13.24      
18 E' 166 165 2.93      
18 E' 166 165 2.92      
19 E" 2993 2977 0.00      
19 E" 2993 2977 0.00      
20 E" 1497 1489 0.00      
20 E" 1497 1489 0.00      
21 E" 632 628 0.00      
21 E" 632 628 0.00      
22 E" 45 45 0.00      
22 E" 45 45 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23247.9 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 23120.0 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 BLYP/3-21G
ABC
0.15914 0.15914 0.08330

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/3-21G

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 2.006 0.000
C3 -1.737 -1.003 0.000
C4 1.737 -1.003 0.000
H5 -1.019 2.429 0.000
H6 -1.594 -2.097 0.000
H7 2.613 -0.332 0.000
H8 0.533 2.401 0.886
H9 0.533 2.401 -0.886
H10 -2.346 -0.739 0.886
H11 -2.346 -0.739 -0.886
H12 1.813 -1.662 0.886
H13 1.813 -1.662 -0.886

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al12.00552.00552.00552.63452.63452.63452.61442.61442.61442.61442.61442.6144
C22.00553.47373.47371.10364.40163.50651.10721.10723.71793.71794.18604.1860
C32.00553.47373.47373.50651.10364.40164.18604.18601.10721.10723.71793.7179
C42.00553.47373.47374.40163.50651.10363.71793.71794.18604.18601.10721.1072
H52.63451.10363.50654.40164.56314.56311.78711.78713.54793.54795.05425.0542
H62.63454.40161.10363.50654.56314.56315.05425.05421.78711.78713.54793.5479
H72.63453.50654.40161.10364.56314.56313.54793.54795.05425.05421.78711.7871
H82.61441.10724.18603.71791.78715.05423.54791.77294.26004.61424.26004.6142
H92.61441.10724.18603.71791.78715.05423.54791.77294.61424.26004.61424.2600
H102.61443.71791.10724.18603.54791.78715.05424.26004.61421.77294.26004.6142
H112.61443.71791.10724.18603.54791.78715.05424.61424.26001.77294.61424.2600
H122.61444.18603.71791.10725.05423.54791.78714.26004.61424.26004.61421.7729
H132.61444.18603.71791.10725.05423.54791.78714.61424.26004.61424.26001.7729

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 112.588 Al1 C2 H8 110.938
Al1 C2 H9 110.938 Al1 C3 H6 112.588
Al1 C3 H10 110.938 Al1 C3 H11 110.938
Al1 C4 H7 112.588 Al1 C4 H12 110.938
Al1 C4 H13 110.938 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.866 H5 C2 H9 107.866
H6 C3 H10 107.866 H6 C3 H11 107.866
H7 C4 H12 107.866 H7 C4 H13 107.866
H8 C2 H9 106.378 H10 C3 H11 106.378
H12 C4 H13 106.378
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 1.014      
2 C -0.901      
3 C -0.901      
4 C -0.901      
5 H 0.188      
6 H 0.188      
7 H 0.188      
8 H 0.188      
9 H 0.188      
10 H 0.188      
11 H 0.188      
12 H 0.188      
13 H 0.188      


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 -36.398 0.000 0.000
y 0.000 -36.398 0.000
z 0.000 0.000 -31.375
Traceless
 xyz
x -2.512 0.000 0.000
y 0.000 -2.512 0.000
z 0.000 0.000 5.023
Polar
3z2-r210.046
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 8.678 0.000 0.000
y 0.000 8.678 0.000
z 0.000 0.000 6.474


<r2> (average value of r2) Å2
<r2> 155.919
(<r2>)1/2 12.487