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All results from a given calculation for C5H8O2 (Acetylacetone)

using model chemistry: QCISD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at QCISD/3-21G
 hartrees
Energy at 0K-342.546176
Energy at 298.15K-342.554739
HF Energy-341.794185
Nuclear repulsion energy293.829103
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 QCISD/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 3136 3039 8.50      
2 A 3094 2998 6.60      
3 A 3075 2980 2.17      
4 A 3033 2940 0.03      
5 A 1710 1657 5.67      
6 A 1555 1507 18.28      
7 A 1552 1504 0.99      
8 A 1524 1477 14.65      
9 A 1452 1407 5.95      
10 A 1278 1238 27.14      
11 A 1161 1125 6.06      
12 A 1129 1094 1.88      
13 A 950 921 3.48      
14 A 774 750 0.03      
15 A 629 610 0.95      
16 A 469 454 6.56      
17 A 331 321 0.68      
18 A 207 201 0.09      
19 A 151 147 0.51      
20 A 67 65 5.90      
21 B 3145 3048 4.56      
22 B 3135 3039 7.62      
23 B 3093 2998 1.31      
24 B 3033 2939 5.24      
25 B 1692 1640 107.54      
26 B 1555 1507 2.63      
27 B 1548 1500 37.59      
28 B 1453 1409 76.64      
29 B 1298 1258 40.97      
30 B 1186 1149 169.55      
31 B 1077 1044 16.31      
32 B 1062 1029 0.49      
33 B 893 865 22.93      
34 B 762 739 4.40      
35 B 533 517 14.98      
36 B 503 487 7.72      
37 B 415 403 0.48      
38 B 204 198 0.78      
39 B 41 40 10.92      

Unscaled Zero Point Vibrational Energy (zpe) 26951.2 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 26121.1 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 QCISD/3-21G
ABC
0.12917 0.06692 0.05189

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.058
C2 0.000 1.232 0.120
C3 0.000 -1.232 0.120
C4 -1.398 1.641 -0.348
C5 1.398 -1.641 -0.348
O6 1.057 1.763 -0.267
O7 -1.057 -1.763 -0.267
H8 -0.907 -0.011 1.675
H9 0.907 0.011 1.675
H10 -1.320 2.359 -1.173
H11 -1.945 0.742 -0.666
H12 -1.949 2.099 0.488
H13 1.320 -2.359 -1.173
H14 1.945 -0.742 -0.666
H15 1.949 -2.099 0.488

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 O6 O7 H8 H9 H10 H11 H12 H13 H14 H15
C11.54861.54862.57422.57422.44602.44601.09631.09633.50462.70282.92003.50462.70282.9200
C21.54862.46441.53013.22971.24493.20022.18742.17442.16392.15432.16404.03822.88023.8765
C31.54862.46443.22971.53013.20021.24492.17442.18744.03822.88023.87652.16392.15432.1640
C42.57421.53013.22974.31222.45973.42282.65793.47261.09591.09991.10054.90574.11755.0879
C52.57423.22971.53014.31223.42282.45973.47262.65794.90574.11755.08791.09591.09991.1005
O62.44601.24493.20022.45973.42284.11213.28262.61922.61263.19623.11724.22862.68734.0348
O72.44603.20021.24493.42282.45974.11212.61923.28264.22862.68734.03482.61263.19623.1172
H81.09632.18742.17442.65793.47263.28262.61921.81333.72772.66902.63564.30963.76053.7304
H91.09632.17442.18743.47262.65792.61923.28261.81334.30963.76053.73043.72772.66902.6356
H103.50462.16394.03821.09594.90572.61264.22863.72774.30961.80621.79495.40534.53035.7712
H112.70282.15432.88021.09994.11753.19622.68732.66903.76051.80621.78164.53034.16264.9554
H122.92002.16403.87651.10055.08793.11724.03482.63563.73041.79491.78165.77124.95545.7275
H133.50464.03822.16394.90571.09594.22862.61264.30963.72775.40534.53035.77121.80621.7949
H142.70282.88022.15434.11751.09992.68733.19623.76052.66904.53034.16264.95541.80621.7816
H152.92003.87652.16405.08791.10054.03483.11723.73042.63565.77124.95545.72751.79491.7816

picture of Acetylacetone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 113.462 C1 C2 O6 121.854
C1 C3 C5 113.462 C1 C3 O7 121.854
C2 C1 C3 105.437 C2 C1 H8 110.418
C2 C1 H9 109.402 C2 C4 H10 109.878
C2 C4 H11 108.895 C2 C4 H12 109.613
C3 C1 H8 109.402 C3 C1 H9 110.418
C3 C5 H13 109.878 C3 C5 H14 108.895
C3 C5 H15 109.613 C4 C2 O6 124.529
C5 C3 O7 124.529 H8 C1 H9 111.587
H10 C4 H11 110.690 H10 C4 H12 109.613
H11 C4 H12 108.122 H13 C5 H14 110.690
H13 C5 H15 109.613 H14 C5 H15 108.122
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability