return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for CH3COCH3 (Acetone)

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no C2V 1A1
2 1 no CS 3A"

State 1 (1A1)

Jump to S2C1
Energy calculated at CBS-Q
 hartrees
Energy at 0K-192.818362
Energy at 298.15K-192.812014
Nuclear repulsion energy120.105673
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 CBS-Q
Rotational Constants (cm-1) from geometry optimized at CBS-Q
See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability

State 2 (3A")

Jump to S1C1
Energy calculated at CBS-Q
 hartrees
Energy at 0K-192.687540
Energy at 298.15K-192.681187
Nuclear repulsion energy 
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 CBS-Q
Rotational Constants (cm-1) from geometry optimized at CBS-Q
See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability