return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C5H8O2 (Acetylacetone)

using model chemistry: QCISD/TZVP

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/TZVP
 hartrees
Energy at 0K-345.001151
Energy at 298.15K-345.009671
HF Energy-343.842253
Nuclear repulsion energy296.258076
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/TZVP
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 3185 3043 8.25      
2 A 3137 2997 9.10      
3 A 3107 2968 4.48      
4 A 3066 2929 0.40      
5 A 1807 1726 21.33      
6 A 1510 1442 2.50      
7 A 1500 1433 20.84      
8 A 1494 1428 3.49      
9 A 1428 1364 4.12      
10 A 1300 1242 21.12      
11 A 1169 1117 0.80      
12 A 1096 1047 0.02      
13 A 965 922 1.83      
14 A 801 766 0.21      
15 A 627 599 1.00      
16 A 497 475 7.27      
17 A 322 308 0.68      
18 A 168 160 0.01      
19 A 148 141 1.18      
20 A 52 49 7.62      
21 B 3185 3043 9.89      
22 B 3174 3033 7.58      
23 B 3137 2997 1.70      
24 B 3066 2929 5.76      
25 B 1785 1705 279.68      
26 B 1501 1434 8.47      
27 B 1498 1431 16.77      
28 B 1428 1364 61.42      
29 B 1307 1249 89.77      
30 B 1223 1168 125.46      
31 B 1084 1036 5.61      
32 B 1018 973 0.52      
33 B 922 881 13.13      
34 B 818 782 5.13      
35 B 555 531 23.00      
36 B 497 475 2.68      
37 B 416 398 1.42      
38 B 166 159 0.01      
39 B 61 58 11.61      

Unscaled Zero Point Vibrational Energy (zpe) 27110.6 cm-1
Scaled (by 0.9553) Zero Point Vibrational Energy (zpe) 25898.8 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 QCISD/TZVP
ABC
0.13818 0.06519 0.05142

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/TZVP

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.006
C2 0.000 1.231 0.098
C3 0.000 -1.231 0.098
C4 -1.356 1.780 -0.279
C5 1.356 -1.780 -0.279
O6 1.043 1.697 -0.311
O7 -1.043 -1.697 -0.311
H8 -0.897 -0.028 1.625
H9 0.897 0.028 1.625
H10 -1.250 2.556 -1.034
H11 -1.990 0.969 -0.645
H12 -1.836 2.194 0.613
H13 1.250 -2.556 -1.034
H14 1.990 -0.969 -0.645
H15 1.836 -2.194 0.613

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 O6 O7 H8 H9 H10 H11 H12 H13 H14 H15
C11.53011.53012.57972.57972.38852.38851.09011.09013.50092.76212.88753.50092.76212.8875
C21.53012.46261.51003.32341.21383.13582.17312.14132.14412.14082.13574.14573.05903.9201
C31.53012.46263.32341.51003.13581.21382.14132.17314.14573.05903.92012.14412.14082.1357
C42.57971.51003.32344.47432.40083.49112.66463.43021.08841.09271.09375.11444.34615.1737
C52.57973.32341.51004.47433.49112.40083.43022.66465.11444.34615.17371.08841.09271.0937
O62.38851.21383.13582.40083.49113.98503.23892.56072.55323.13803.06424.31932.84964.0772
O72.38853.13581.21383.49112.40083.98502.56073.23894.31932.84964.07722.55323.13803.0642
H81.09012.17312.14132.66463.43023.23892.56071.79493.72422.71002.61564.25083.79193.6309
H91.09012.14132.17313.43022.66462.56073.23891.79494.25083.79193.63093.72422.71002.6156
H103.50092.14414.14571.08845.11442.55324.31933.72424.25081.79361.78475.69054.80415.8986
H112.76212.14083.05901.09274.34613.13802.84962.71003.79191.79361.76254.80414.42805.1214
H122.88752.13573.92011.09375.17373.06424.07722.61563.63091.78471.76255.89865.12145.7211
H133.50094.14572.14415.11441.08844.31932.55324.25083.72425.69054.80415.89861.79361.7847
H142.76213.05902.14084.34611.09272.84963.13803.79192.71004.80414.42805.12141.79361.7625
H152.88753.92012.13575.17371.09374.07723.06423.63092.61565.89865.12145.72111.78471.7625

picture of Acetylacetone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 116.111 C1 C2 O6 120.596
C1 C3 C5 116.111 C1 C3 O7 120.596
C2 C1 C3 107.168 C2 C1 H8 110.948
C2 C1 H9 108.448 C2 C4 H10 110.159
C2 C4 H11 109.634 C2 C4 H12 109.177
C3 C1 H8 108.448 C3 C1 H9 110.948
C3 C5 H13 110.159 C3 C5 H14 109.634
C3 C5 H15 109.177 C4 C2 O6 123.264
C5 C3 O7 123.264 H8 C1 H9 110.826
H10 C4 H11 110.637 H10 C4 H12 109.750
H11 C4 H12 107.431 H13 C5 H14 110.637
H13 C5 H15 109.750 H14 C5 H15 107.431
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability