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

using model chemistry: CCSD/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 CCSD/6-31G*
 hartrees
Energy at 0K-361.258258
Energy at 298.15K-361.265749
HF Energy-360.754128
Nuclear repulsion energy150.039925
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 CCSD/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' 3130 2956 0.00      
2 A' 3040 2871 0.00      
3 A' 1506 1422 0.00      
4 A' 1320 1246 0.00      
5 A' 622 587 0.00      
6 A' 520 491 0.00      
7 A" 3106 2933 58.93      
8 A" 1509 1425 5.40      
9 A" 766 723 121.39      
10 A" 187 176 7.75      
11 A" 37 35 0.01      
12 E' 3131 2957 33.19      
12 E' 3131 2957 33.19      
13 E' 3039 2870 11.31      
13 E' 3039 2870 11.31      
14 E' 1505 1421 0.81      
14 E' 1505 1421 0.81      
15 E' 1315 1242 35.55      
15 E' 1315 1242 35.55      
16 E' 801 756 163.30      
16 E' 801 756 163.30      
17 E' 656 620 13.48      
17 E' 656 620 13.48      
18 E' 170 160 3.76      
18 E' 170 160 3.76      
19 E" 3105 2932 0.00      
19 E" 3105 2932 0.00      
20 E" 1507 1423 0.00      
20 E" 1507 1423 0.00      
21 E" 591 558 0.00      
21 E" 591 558 0.00      
22 E" 20 19 0.00      
22 E" 20 19 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23711.5 cm-1
Scaled (by 0.9443) Zero Point Vibrational Energy (zpe) 22390.8 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 CCSD/6-31G*
ABC
0.16358 0.16358 0.08566

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/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 1.975 0.000
C3 -1.710 -0.987 0.000
C4 1.710 -0.987 0.000
H5 -1.007 2.410 0.000
H6 -1.584 -2.078 0.000
H7 2.591 -0.333 0.000
H8 0.529 2.375 0.878
H9 0.529 2.375 -0.878
H10 -2.321 -0.729 0.878
H11 -2.321 -0.729 -0.878
H12 1.792 -1.646 0.878
H13 1.792 -1.646 -0.878

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.97451.97451.97452.61252.61252.61252.58672.58672.58672.58672.58672.5867
C21.97453.41993.41991.09774.35073.46961.10041.10043.67003.67004.13394.1339
C31.97453.41993.41993.46961.09774.35074.13394.13391.10041.10043.67003.6700
C41.97453.41993.41994.35073.46961.09773.67003.67004.13394.13391.10041.1004
H52.61251.09773.46964.35074.52504.52501.77011.77013.51473.51475.00625.0062
H62.61254.35071.09773.46964.52504.52505.00625.00621.77011.77013.51473.5147
H72.61253.46964.35071.09774.52504.52503.51473.51475.00625.00621.77011.7701
H82.58671.10044.13393.67001.77015.00623.51471.75544.21454.56544.21454.5654
H92.58671.10044.13393.67001.77015.00623.51471.75544.56544.21454.56544.2145
H102.58673.67001.10044.13393.51471.77015.00624.21454.56541.75544.21454.5654
H112.58673.67001.10044.13393.51471.77015.00624.56544.21451.75544.56544.2145
H122.58674.13393.67001.10045.00623.51471.77014.21454.56544.21454.56541.7554
H132.58674.13393.67001.10045.00623.51471.77014.56544.21454.56544.21451.7554

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 113.399 Al1 C2 H8 111.341
Al1 C2 H9 111.341 Al1 C3 H6 113.399
Al1 C3 H10 111.341 Al1 C3 H11 111.341
Al1 C4 H7 113.399 Al1 C4 H12 111.341
Al1 C4 H13 111.341 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.276 H5 C2 H9 107.276
H6 C3 H10 107.276 H6 C3 H11 107.276
H7 C4 H12 107.276 H7 C4 H13 107.276
H8 C2 H9 105.802 H10 C3 H11 105.802
H12 C4 H13 105.802
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability