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

using model chemistry: B3PW91/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3H 1A'
Energy calculated at B3PW91/cc-pVDZ
 hartrees
Energy at 0K-362.110064
Energy at 298.15K-362.117442
HF Energy-362.110064
Nuclear repulsion energy149.854225
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 B3PW91/cc-pVDZ
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' 3127 3018 0.00      
2 A' 3022 2917 0.00      
3 A' 1420 1370 0.00      
4 A' 1208 1166 0.00      
5 A' 595 574 0.00      
6 A' 506 489 0.00      
7 A" 3097 2988 30.49      
8 A" 1425 1375 3.64      
9 A" 713 688 104.43      
10 A" 184 178 5.15      
11 A" 52 50 0.06      
12 E' 3127 3018 20.22      
12 E' 3127 3018 20.22      
13 E' 3021 2915 11.10      
13 E' 3021 2915 11.11      
14 E' 1417 1368 0.30      
14 E' 1417 1368 0.30      
15 E' 1205 1162 28.19      
15 E' 1205 1162 28.19      
16 E' 753 727 161.77      
16 E' 753 727 161.77      
17 E' 636 613 14.57      
17 E' 636 613 14.58      
18 E' 168 162 3.49      
18 E' 168 162 3.49      
19 E" 3096 2988 0.00      
19 E" 3096 2988 0.00      
20 E" 1422 1373 0.00      
20 E" 1422 1373 0.00      
21 E" 553 534 0.00      
21 E" 553 534 0.00      
22 E" 24 23 0.00      
22 E" 24 23 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23096.2 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 22287.9 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 B3PW91/cc-pVDZ
ABC
0.16339 0.16339 0.08560

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVDZ

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 -1.711 -0.988 0.000
C4 1.711 -0.988 0.000
H5 -1.008 2.421 0.000
H6 -1.593 -2.084 0.000
H7 2.601 -0.338 0.000
H8 0.540 2.368 0.882
H9 0.540 2.368 -0.882
H10 -2.321 -0.717 0.882
H11 -2.321 -0.717 -0.882
H12 1.781 -1.651 0.882
H13 1.781 -1.651 -0.882

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.97541.97541.97542.62262.62262.62262.58372.58372.58372.58372.58372.5837
C21.97543.42153.42151.10224.36033.48051.10571.10573.66193.66194.13554.1355
C31.97543.42153.42153.48051.10224.36034.13554.13551.10571.10573.66193.6619
C41.97543.42153.42154.36033.48051.10223.66193.66194.13554.13551.10571.1057
H52.62261.10223.48054.36034.54244.54241.78191.78193.51363.51365.01405.0140
H62.62264.36031.10223.48054.54244.54245.01405.01401.78191.78193.51363.5136
H72.62263.48054.36031.10224.54244.54243.51363.51365.01405.01401.78191.7819
H82.58371.10574.13553.66191.78195.01403.51361.76314.20664.56124.20664.5612
H92.58371.10574.13553.66191.78195.01403.51361.76314.56124.20664.56124.2066
H102.58373.66191.10574.13553.51361.78195.01404.20664.56121.76314.20664.5612
H112.58373.66191.10574.13553.51361.78195.01404.56124.20661.76314.56124.2066
H122.58374.13553.66191.10575.01403.51361.78194.20664.56124.20664.56121.7631
H132.58374.13553.66191.10575.01403.51361.78194.56124.20664.56124.20661.7631

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 113.851 Al1 C2 H8 110.798
Al1 C2 H9 110.798 Al1 C3 H6 113.851
Al1 C3 H10 110.798 Al1 C3 H11 110.798
Al1 C4 H7 113.851 Al1 C4 H12 110.798
Al1 C4 H13 110.798 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.626 H5 C2 H9 107.626
H6 C3 H10 107.626 H6 C3 H11 107.626
H7 C4 H12 107.626 H7 C4 H13 107.626
H8 C2 H9 105.750 H10 C3 H11 105.750
H12 C4 H13 105.750
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 0.469      
2 C -0.315      
3 C -0.315      
4 C -0.315      
5 H 0.051      
6 H 0.051      
7 H 0.051      
8 H 0.054      
9 H 0.054      
10 H 0.054      
11 H 0.054      
12 H 0.054      
13 H 0.054      


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 -36.242 0.000 0.000
y 0.000 -36.242 0.000
z 0.000 0.000 -31.243
Traceless
 xyz
x -2.499 0.000 0.000
y 0.000 -2.499 0.000
z 0.000 0.000 4.999
Polar
3z2-r29.998
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 9.375 0.000 0.000
y 0.000 9.375 0.000
z 0.000 0.000 7.117


<r2> (average value of r2) Å2
<r2> 152.524
(<r2>)1/2 12.350