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

using model chemistry: B1B95/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 B1B95/SDD
 hartrees
Energy at 0K-362.091628
Energy at 298.15K-362.099288
HF Energy-362.091628
Nuclear repulsion energy150.501986
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 B1B95/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' 3148 3148 0.00      
2 A' 3034 3034 0.00      
3 A' 1490 1490 0.00      
4 A' 1306 1306 0.00      
5 A' 666 666 0.00      
6 A' 529 529 0.00      
7 A" 3119 3119 62.35      
8 A" 1488 1488 20.47      
9 A" 809 809 144.32      
10 A" 187 187 8.46      
11 A" 49 49 0.21      
12 E' 3149 3149 39.53      
12 E' 3149 3149 39.55      
13 E' 3032 3032 25.89      
13 E' 3032 3032 25.86      
14 E' 1485 1485 6.14      
14 E' 1485 1485 6.14      
15 E' 1302 1302 92.47      
15 E' 1302 1302 92.37      
16 E' 834 834 184.07      
16 E' 834 834 184.07      
17 E' 673 673 17.02      
17 E' 673 673 17.01      
18 E' 171 171 4.67      
18 E' 171 171 4.67      
19 E" 3119 3119 0.00      
19 E" 3119 3119 0.00      
20 E" 1487 1487 0.00      
20 E" 1487 1487 0.00      
21 E" 648 648 0.00      
21 E" 648 648 0.00      
22 E" 18 18 0.00      
22 E" 18 18 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23828.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 23828.5 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 B1B95/SDD
ABC
0.16471 0.16471 0.08629

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/SDD

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 1.968 0.000
C3 -1.704 -0.984 0.000
C4 1.704 -0.984 0.000
H5 -1.012 2.390 0.000
H6 -1.564 -2.071 0.000
H7 2.576 -0.319 0.000
H8 0.526 2.368 0.879
H9 0.526 2.368 -0.879
H10 -2.314 -0.729 0.879
H11 -2.314 -0.729 -0.879
H12 1.788 -1.640 0.879
H13 1.788 -1.640 -0.879

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.96781.96781.96782.59562.59562.59562.58002.58002.58002.58002.58002.5800
C21.96783.40833.40831.09624.33133.44461.09941.09943.66013.66014.12084.1208
C31.96783.40833.40833.44461.09624.33134.12084.12081.09941.09943.66013.6601
C41.96783.40833.40834.33133.44461.09623.66013.66014.12084.12081.09941.0994
H52.59561.09623.44464.33134.49564.49561.77091.77093.49223.49224.98484.9848
H62.59564.33131.09623.44464.49564.49564.98484.98481.77091.77093.49223.4922
H72.59563.44464.33131.09624.49564.49563.49223.49224.98484.98481.77091.7709
H82.58001.09944.12083.66011.77094.98483.49221.75714.20174.55424.20174.5542
H92.58001.09944.12083.66011.77094.98483.49221.75714.55424.20174.55424.2017
H102.58003.66011.09944.12083.49221.77094.98484.20174.55421.75714.20174.5542
H112.58003.66011.09944.12083.49221.77094.98484.55424.20171.75714.55424.2017
H122.58004.12083.66011.09944.98483.49221.77094.20174.55424.20174.55421.7571
H132.58004.12083.66011.09944.98483.49221.77094.55424.20174.55424.20171.7571

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 112.672 Al1 C2 H8 111.353
Al1 C2 H9 111.353 Al1 C3 H6 112.671
Al1 C3 H10 111.353 Al1 C3 H11 111.353
Al1 C4 H7 112.672 Al1 C4 H12 111.353
Al1 C4 H13 111.353 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.523 H5 C2 H9 107.523
H6 C3 H10 107.523 H6 C3 H11 107.523
H7 C4 H12 107.523 H7 C4 H13 107.523
H8 C2 H9 106.087 H10 C3 H11 106.087
H12 C4 H13 106.087
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 1.412      
2 C -1.180      
3 C -1.180      
4 C -1.180      
5 H 0.235      
6 H 0.235      
7 H 0.235      
8 H 0.237      
9 H 0.237      
10 H 0.237      
11 H 0.237      
12 H 0.237      
13 H 0.237      


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 -37.081 0.000 0.000
y 0.000 -37.081 0.000
z 0.000 0.000 -30.961
Traceless
 xyz
x -3.060 0.000 0.000
y 0.000 -3.060 0.000
z 0.000 0.000 6.120
Polar
3z2-r212.240
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 8.778 0.000 0.000
y 0.000 8.776 0.000
z 0.000 0.000 6.592


<r2> (average value of r2) Å2
<r2> 151.736
(<r2>)1/2 12.318