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

using model chemistry: CISD/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3H 1A'
Energy calculated at CISD/6-31G
 hartrees
Energy at 0K-361.016604
Energy at 298.15K-361.024286
HF Energy-360.699975
Nuclear repulsion energy148.600600
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 CISD/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' 3152 2956 0.00      
2 A' 3063 2872 0.00      
3 A' 1533 1438 0.00      
4 A' 1370 1285 0.00      
5 A' 678 636 0.00      
6 A' 506 475 0.00      
7 A" 3127 2933 73.95      
8 A" 1535 1440 10.98      
9 A" 827 776 133.58      
10 A" 191 179 11.55      
11 A" 36 34 0.03      
12 E' 3153 2957 40.59      
12 E' 3153 2957 40.59      
13 E' 3056 2866 22.03      
13 E' 3056 2866 22.03      
14 E' 1532 1437 2.64      
14 E' 1532 1437 2.64      
15 E' 1364 1279 47.01      
15 E' 1364 1279 47.01      
16 E' 846 794 160.90      
16 E' 846 794 160.90      
17 E' 654 613 22.39      
17 E' 654 613 22.39      
18 E' 168 157 5.47      
18 E' 168 157 5.47      
19 E" 3127 2932 0.00      
19 E" 3127 2932 0.00      
20 E" 1535 1439 0.00      
20 E" 1535 1439 0.00      
21 E" 659 618 0.00      
21 E" 659 618 0.00      
22 E" 24 22 0.00      
22 E" 24 22 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24126.0 cm-1
Scaled (by 0.9378) Zero Point Vibrational Energy (zpe) 22625.3 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 CISD/6-31G
ABC
0.15981 0.15981 0.08363

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/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 2.002 0.000
C3 -1.734 -1.001 0.000
C4 1.734 -1.001 0.000
H5 -1.015 2.419 0.000
H6 -1.588 -2.089 0.000
H7 2.603 -0.331 0.000
H8 0.526 2.398 0.882
H9 0.526 2.398 -0.882
H10 -2.340 -0.744 0.882
H11 -2.340 -0.744 -0.882
H12 1.814 -1.655 0.882
H13 1.814 -1.655 -0.882

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al12.00212.00212.00212.62362.62362.62362.60882.60882.60882.60882.60882.6088
C22.00213.46773.46771.09734.38803.49511.10031.10033.71393.71394.17614.1761
C32.00213.46773.46773.49511.09734.38804.17614.17611.10031.10033.71393.7139
C42.00213.46773.46774.38803.49511.09733.71393.71394.17614.17611.10031.1003
H52.62361.09733.49514.38804.54414.54411.77521.77523.54103.54105.03765.0376
H62.62364.38801.09733.49514.54414.54415.03765.03761.77521.77523.54103.5410
H72.62363.49514.38801.09734.54414.54413.54103.54105.03765.03761.77521.7752
H82.60881.10034.17613.71391.77525.03763.54101.76314.25284.60384.25284.6038
H92.60881.10034.17613.71391.77525.03763.54101.76314.60384.25284.60384.2528
H102.60883.71391.10034.17613.54101.77525.03764.25284.60381.76314.25284.6038
H112.60883.71391.10034.17613.54101.77525.03764.60384.25281.76314.60384.2528
H122.60884.17613.71391.10035.03763.54101.77524.25284.60384.25284.60381.7631
H132.60884.17613.71391.10035.03763.54101.77524.60384.25284.60384.25281.7631

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 112.346 Al1 C2 H8 111.112
Al1 C2 H9 111.112 Al1 C3 H6 112.346
Al1 C3 H10 111.112 Al1 C3 H11 111.112
Al1 C4 H7 112.346 Al1 C4 H12 111.112
Al1 C4 H13 111.112 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.760 H5 C2 H9 107.760
H6 C3 H10 107.760 H6 C3 H11 107.760
H7 C4 H12 107.760 H7 C4 H13 107.760
H8 C2 H9 106.487 H10 C3 H11 106.487
H12 C4 H13 106.487
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability