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: PBEPBE/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at PBEPBE/6-31G**
 hartrees
Energy at 0K-345.385484
Energy at 298.15K-345.393752
HF Energy-345.385484
Nuclear repulsion energy294.830082
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 PBEPBE/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 3114 3072 6.38      
2 A 3051 3010 3.63      
3 A 3022 2981 2.08      
4 A 2982 2941 0.15      
5 A 1766 1742 16.46      
6 A 1436 1417 8.15      
7 A 1432 1413 14.38      
8 A 1418 1399 7.38      
9 A 1340 1321 7.94      
10 A 1233 1216 25.82      
11 A 1103 1088 1.82      
12 A 1035 1021 0.86      
13 A 906 894 0.85      
14 A 769 758 0.22      
15 A 603 595 1.97      
16 A 470 464 4.36      
17 A 315 311 0.87      
18 A 178 175 0.34      
19 A 138 136 0.62      
20 A 67 66 6.62      
21 B 3114 3071 6.04      
22 B 3099 3056 5.07      
23 B 3051 3009 0.09      
24 B 2981 2941 3.04      
25 B 1738 1715 286.17      
26 B 1433 1413 1.60      
27 B 1428 1408 23.26      
28 B 1339 1320 103.86      
29 B 1189 1173 130.18      
30 B 1148 1132 190.46      
31 B 1022 1008 10.67      
32 B 959 946 1.13      
33 B 860 848 30.67      
34 B 786 775 15.85      
35 B 527 519 25.38      
36 B 481 475 0.59      
37 B 401 395 1.22      
38 B 178 175 0.87      
39 B 42 42 9.65      

Unscaled Zero Point Vibrational Energy (zpe) 26077.0 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 25719.7 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 PBEPBE/6-31G**
ABC
0.13459 0.06550 0.05139

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.026
C2 0.000 1.238 0.108
C3 0.000 -1.238 0.108
C4 -1.367 1.736 -0.309
C5 1.367 -1.736 -0.309
O6 1.051 1.724 -0.292
O7 -1.051 -1.724 -0.292
H8 -0.907 -0.031 1.647
H9 0.907 0.031 1.647
H10 -1.274 2.497 -1.095
H11 -1.978 0.885 -0.657
H12 -1.892 2.166 0.562
H13 1.274 -2.497 -1.095
H14 1.978 -0.885 -0.657
H15 1.892 -2.166 0.562

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 O6 O7 H8 H9 H10 H11 H12 H13 H14 H15
C11.54061.54062.58132.58132.41102.41101.10011.10013.51512.74362.91293.51512.74362.9129
C21.54062.47561.51353.29951.22533.16832.19112.15532.15802.15022.15574.12593.00103.9204
C31.54062.47563.29951.51353.16831.22532.15532.19114.12593.00103.92042.15802.15022.1557
C42.58131.51353.29954.41932.41813.47472.67583.45011.09811.10411.10415.05134.26415.1579
C52.58133.29951.51354.41933.47472.41813.45012.67585.05134.26415.15791.09811.10411.1041
O62.41101.22533.16832.41813.47474.03863.26732.57752.57853.16453.09624.30312.79314.0703
O72.41103.16831.22533.47472.41814.03862.57753.26734.30312.79314.07032.57853.16453.0962
H81.10012.19112.15532.67583.45013.26732.57751.81593.74772.70062.64064.28433.78983.6836
H91.10012.15532.19113.45012.67582.57753.26731.81594.28433.78983.68363.74772.70062.6406
H103.51512.15804.12591.09815.05132.57854.30313.74774.28431.81311.79935.60744.71295.8749
H112.74362.15023.00101.10414.26413.16452.79312.70063.78981.81311.77004.71294.33455.0767
H122.91292.15573.92041.10415.15793.09624.07032.64063.68361.79931.77005.87495.07675.7516
H133.51514.12592.15805.05131.09814.30312.57854.28433.74775.60744.71295.87491.81311.7993
H142.74363.00102.15024.26411.10412.79313.16453.78982.70064.71294.33455.07671.81311.7700
H152.91293.92042.15575.15791.10414.07033.09623.68362.64065.87495.07675.75161.79931.7700

picture of Acetylacetone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 115.381 C1 C2 O6 120.884
C1 C3 C5 115.381 C1 C3 O7 120.884
C2 C1 C3 106.921 C2 C1 H8 111.046
C2 C1 H9 108.254 C2 C4 H10 110.436
C2 C4 H11 109.462 C2 C4 H12 109.893
C3 C1 H8 108.254 C3 C1 H9 111.046
C3 C5 H13 110.436 C3 C5 H14 109.462
C3 C5 H15 109.893 C4 C2 O6 123.644
C5 C3 O7 123.644 H8 C1 H9 111.245
H10 C4 H11 110.835 H10 C4 H12 109.577
H11 C4 H12 106.562 H13 C5 H14 110.835
H13 C5 H15 109.577 H14 C5 H15 106.562
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.343      
2 C 0.383      
3 C 0.383      
4 C -0.435      
5 C -0.435      
6 O -0.395      
7 O -0.395      
8 H 0.146      
9 H 0.146      
10 H 0.154      
11 H 0.167      
12 H 0.151      
13 H 0.154      
14 H 0.167      
15 H 0.151      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 1.416 1.416
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.725 -8.768 0.000
y -8.768 -44.903 0.000
z 0.000 0.000 -39.854
Traceless
 xyz
x -0.346 -8.768 0.000
y -8.768 -3.614 0.000
z 0.000 0.000 3.960
Polar
3z2-r27.919
x2-y22.179
xy-8.768
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.487 -0.418 0.000
y -0.418 10.082 0.000
z 0.000 0.000 7.084


<r2> (average value of r2) Å2
<r2> 230.336
(<r2>)1/2 15.177