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All results from a given calculation for C5H8O2 (Acetylacetone)

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CBS-Q
 hartrees
Energy at 0K-345.232070
Energy at 298.15K-345.222725
HF Energy-343.727168
Nuclear repulsion energy297.415356
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
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3316 3316 10.25      
2 A 3265 3265 13.97      
3 A 3240 3240 5.24      
4 A 3195 3195 0.80      
5 A 2021 2021 35.52      
6 A 1616 1616 11.41      
7 A 1609 1609 11.45      
8 A 1599 1599 3.63      
9 A 1537 1537 5.93      
10 A 1386 1386 30.26      
11 A 1251 1251 1.48      
12 A 1189 1189 0.67      
13 A 1027 1027 1.22      
14 A 852 852 0.14      
15 A 678 678 0.50      
16 A 527 527 12.73      
17 A 336 336 0.64      
18 A 173 173 0.10      
19 A 157 157 1.51      
20 A 51 51 9.23      
21 B 3316 3316 14.50      
22 B 3303 3303 11.27      
23 B 3264 3264 3.62      
24 B 3196 3196 7.74      
25 B 1998 1998 436.64      
26 B 1610 1610 1.30      
27 B 1602 1602 23.49      
28 B 1537 1537 70.48      
29 B 1423 1423 97.06      
30 B 1302 1302 131.89      
31 B 1162 1162 5.48      
32 B 1097 1097 1.35      
33 B 989 989 6.94      
34 B 862 862 1.83      
35 B 590 590 28.84      
36 B 542 542 10.75      
37 B 433 433 1.93      
38 B 171 171 0.07      
39 B 58 58 13.43      

Unscaled Zero Point Vibrational Energy (zpe) 28736.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 28736.9 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 CBS-Q
ABC
0.13469 0.06675 0.05230

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.000
C2 0.000 1.233 0.101
C3 0.000 -1.233 0.101
C4 -1.341 1.800 -0.285
C5 1.341 -1.800 -0.285
O6 1.027 1.674 -0.302
O7 -1.027 -1.674 -0.302
H8 -0.890 -0.031 1.618
H9 0.890 0.031 1.618
H10 -1.215 2.570 -1.035
H11 -1.985 1.007 -0.657
H12 -1.821 2.223 0.596
H13 1.215 -2.570 -1.035
H14 1.985 -1.007 -0.657
H15 1.821 -2.223 0.596

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 O6 O7 H8 H9 H10 H11 H12 H13 H14 H15
C11.52611.52612.58612.58612.35672.35671.08391.08393.49672.77482.90213.49672.77482.9021
C21.52612.46551.50583.33811.18823.10932.16582.13062.13462.13622.13124.15103.08723.9376
C31.52612.46553.33811.50583.10931.18822.13062.16584.15103.08723.93762.13462.13622.1312
C42.58611.50583.33814.48872.37103.48832.67833.42441.08291.08691.08855.11824.36775.1920
C52.58613.33811.50584.48873.48832.37103.42442.67835.11824.36775.19201.08291.08691.0885
O62.35671.18823.10932.37103.48833.92813.20452.53122.52353.10483.03624.31152.86954.0776
O72.35673.10931.18823.48832.37103.92812.53123.20454.31152.86954.07762.52353.10483.0362
H81.08392.16582.13062.67833.42443.20452.53121.78153.72952.72942.64404.23353.79383.6336
H91.08392.13062.16583.42442.67832.53123.20451.78154.23353.79383.63363.72952.72942.6440
H103.49672.13464.15101.08295.11822.52354.31153.72954.23351.78261.77405.68654.81505.9041
H112.77482.13623.08721.08694.36773.10482.86952.72943.79381.78261.75334.81504.45135.1467
H122.90212.13123.93761.08855.19203.03624.07762.64403.63361.77401.75335.90415.14675.7476
H133.49674.15102.13465.11821.08294.31152.52354.23353.72955.68654.81505.90411.78261.7740
H142.77483.08722.13624.36771.08692.86953.10483.79382.72944.81504.45135.14671.78261.7533
H152.90213.93762.13125.19201.08854.07763.03623.63362.64405.90415.14675.74761.77401.7533

picture of Acetylacetone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 117.068 C1 C2 O6 120.003
C1 C3 C5 117.068 C1 C3 O7 120.003
C2 C1 C3 107.762 C2 C1 H8 111.022
C2 C1 H9 108.243 C2 C4 H10 110.018
C2 C4 H11 109.908 C2 C4 H12 109.417
C3 C1 H8 108.243 C3 C1 H9 111.022
C3 C5 H13 110.018 C3 C5 H14 109.908
C3 C5 H15 109.417 C4 C2 O6 122.873
C5 C3 O7 122.873 H8 C1 H9 110.525
H10 C4 H11 110.482 H10 C4 H12 109.563
H11 C4 H12 107.407 H13 C5 H14 110.482
H13 C5 H15 109.563 H14 C5 H15 107.407
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability