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

using model chemistry: B3LYPultrafine/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3H 1A'
Energy calculated at B3LYPultrafine/aug-cc-pVTZ
 hartrees
Energy at 0K-362.272412
Energy at 298.15K-362.279887
HF Energy-362.272412
Nuclear repulsion energy150.644653
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 B3LYPultrafine/aug-cc-pVTZ
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' 3084 2984 0.00      
2 A' 3005 2908 0.00      
3 A' 1453 1406 0.00      
4 A' 1233 1193 0.00      
5 A' 599 580 0.00      
6 A' 514 497 0.00      
7 A" 3056 2957 45.05      
8 A" 1457 1409 3.60      
9 A" 721 698 79.81      
10 A" 184 178 8.32      
11 A" 52 50 0.02      
12 E' 3085 2984 28.77      
12 E' 3085 2984 28.76      
13 E' 3003 2906 14.51      
13 E' 3003 2906 14.51      
14 E' 1451 1404 0.59      
14 E' 1451 1404 0.59      
15 E' 1231 1191 35.82      
15 E' 1231 1191 35.82      
16 E' 758 734 149.60      
16 E' 758 734 149.58      
17 E' 641 621 18.09      
17 E' 641 621 18.10      
18 E' 169 164 5.25      
18 E' 169 164 5.25      
19 E" 3056 2957 0.00      
19 E" 3056 2957 0.00      
20 E" 1454 1407 0.00      
20 E" 1454 1407 0.00      
21 E" 563 545 0.00      
21 E" 563 545 0.00      
22 E" 32 30 0.00      
22 E" 32 30 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23122.5 cm-1
Scaled (by 0.9675) Zero Point Vibrational Energy (zpe) 22371.1 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 B3LYPultrafine/aug-cc-pVTZ
ABC
0.16480 0.16480 0.08629

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/aug-cc-pVTZ

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 1.969 0.000
C3 -1.705 -0.985 0.000
C4 1.705 -0.985 0.000
H5 -1.003 2.399 0.000
H6 -1.576 -2.068 0.000
H7 2.579 -0.331 0.000
H8 0.528 2.362 0.874
H9 0.528 2.362 -0.874
H10 -2.310 -0.724 0.874
H11 -2.310 -0.724 -0.874
H12 1.782 -1.638 0.874
H13 1.782 -1.638 -0.874

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.96911.96911.96912.60032.60032.60032.57352.57352.57352.57352.57352.5735
C21.96913.41053.41051.09154.33413.45561.09421.09423.65403.65404.11724.1172
C31.96913.41053.41053.45561.09154.33414.11724.11721.09421.09423.65403.6540
C41.96913.41053.41054.33413.45561.09153.65403.65404.11724.11721.09421.0942
H52.60031.09153.45564.33414.50394.50391.76341.76343.49633.49634.98194.9819
H62.60034.33411.09153.45564.50394.50394.98194.98191.76341.76343.49633.4963
H72.60033.45564.33411.09154.50394.50393.49633.49634.98194.98191.76341.7634
H82.57351.09424.11723.65401.76344.98193.49631.74834.19244.54234.19244.5423
H92.57351.09424.11723.65401.76344.98193.49631.74834.54234.19244.54234.1924
H102.57353.65401.09424.11723.49631.76344.98194.19244.54231.74834.19244.5423
H112.57353.65401.09424.11723.49631.76344.98194.54234.19241.74834.54234.1924
H122.57354.11723.65401.09424.98193.49631.76344.19244.54234.19244.54231.7483
H132.57354.11723.65401.09424.98193.49631.76344.54234.19244.54234.19241.7483

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 113.198 Al1 C2 H8 111.058
Al1 C2 H9 111.058 Al1 C3 H6 113.198
Al1 C3 H10 111.058 Al1 C3 H11 111.058
Al1 C4 H7 113.198 Al1 C4 H12 111.058
Al1 C4 H13 111.058 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.566 H5 C2 H9 107.566
H6 C3 H10 107.566 H6 C3 H11 107.566
H7 C4 H12 107.566 H7 C4 H13 107.566
H8 C2 H9 106.050 H10 C3 H11 106.050
H12 C4 H13 106.050
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 0.517      
2 C -0.563      
3 C -0.563      
4 C -0.563      
5 H 0.181      
6 H 0.181      
7 H 0.181      
8 H 0.105      
9 H 0.105      
10 H 0.105      
11 H 0.105      
12 H 0.105      
13 H 0.105      


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 -37.849 0.000 0.000
y 0.000 -37.849 0.000
z 0.000 0.000 -31.680
Traceless
 xyz
x -3.084 0.000 0.000
y 0.000 -3.084 0.000
z 0.000 0.000 6.169
Polar
3z2-r212.338
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 10.882 0.000 0.000
y 0.000 10.882 0.000
z 0.000 0.000 8.239


<r2> (average value of r2) Å2
<r2> 152.110
(<r2>)1/2 12.333