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All results from a given calculation for CH3COCH3 (Acetone)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-191.284469
Energy at 298.15K-191.290583
HF Energy-190.883599
Nuclear repulsion energy117.683047
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 MP2/3-21G*
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 3193 3037 7.17 60.49 0.68 0.81
2 A 3152 2998 0.00 6.22 0.75 0.86
3 A 3090 2939 3.73 158.92 0.01 0.02
4 A 1672 1591 24.11 2.21 0.75 0.86
5 A 1573 1496 0.00 39.59 0.75 0.86
6 A 1559 1483 32.69 38.90 0.75 0.86
7 A 1467 1395 19.82 1.83 0.71 0.83
8 A 1119 1064 0.10 6.52 0.63 0.77
9 A 967 920 0.00 4.31 0.75 0.86
10 A 752 716 1.05 13.16 0.17 0.29
11 A 383 364 0.45 0.24 0.49 0.65
12 A 114 109 0.00 0.06 0.75 0.86
13 B 3192 3036 10.80 47.12 0.75 0.86
14 B 3159 3005 16.63 90.45 0.75 0.86
15 B 3085 2935 1.77 0.13 0.75 0.86
16 B 1592 1514 24.04 0.50 0.75 0.86
17 B 1566 1490 0.69 1.01 0.75 0.86
18 B 1458 1387 38.91 6.30 0.75 0.86
19 B 1236 1176 90.10 0.04 0.75 0.86
20 B 1178 1120 3.65 0.11 0.75 0.86
21 B 915 871 11.15 4.31 0.75 0.86
22 B 513 488 11.62 2.26 0.75 0.86
23 B 508 483 0.00 1.19 0.75 0.86
24 B 168 160 0.27 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18804.5 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 17888.7 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 MP2/3-21G*
ABC
0.32019 0.28301 0.15924

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.189
O2 0.000 0.000 1.440
C3 0.000 1.291 -0.636
C4 0.000 -1.291 -0.636
H5 0.001 2.146 0.044
H6 -0.001 -2.146 0.044
H7 0.887 1.326 -1.279
H8 -0.888 1.327 -1.277
H9 -0.887 -1.326 -1.279
H10 0.888 -1.327 -1.277

Atom - Atom Distances (Å)
  C1 O2 C3 C4 H5 H6 H7 H8 H9 H10
C11.25181.53181.53182.15132.15132.16782.16772.16782.1677
O21.25182.44492.44492.56082.56083.15293.15213.15293.1521
C31.53182.44492.58221.09243.50401.09601.09602.83762.8383
C41.53182.44492.58223.50401.09242.83762.83831.09601.0960
H52.15132.56081.09243.50404.29281.79071.79053.82083.8208
H62.15132.56083.50401.09244.29283.82083.82081.79071.7905
H72.16783.15291.09602.83761.79073.82081.77463.19112.6538
H82.16773.15211.09602.83831.79053.82081.77462.65383.1938
H92.16783.15292.83761.09603.82081.79073.19112.65381.7746
H102.16773.15212.83831.09603.82081.79052.65383.19381.7746

picture of Acetone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 H5 108.977 C1 C3 H7 110.062
C1 C3 H8 110.047 C1 C4 H6 108.977
C1 C4 H9 110.062 C1 C4 H10 110.047
O2 C1 C3 122.559 O2 C1 C4 122.559
C3 C1 C4 114.883 H5 C3 H7 109.825
H5 C3 H8 109.804 H6 C4 H9 109.825
H6 C4 H10 109.804 H7 C3 H8 108.116
H9 C4 H10 108.116
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability