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 CH3COCH2 (Acetonyl radical)

using model chemistry: PBEPBE/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A"
Energy calculated at PBEPBE/STO-3G
 hartrees
Energy at 0K-189.778242
Energy at 298.15K 
HF Energy-189.778242
Nuclear repulsion energy108.563848
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/STO-3G
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' 3481 3181 0.14      
2 A' 3427 3131 0.17      
3 A' 3306 3021 7.21      
4 A' 3239 2959 0.20      
5 A' 1627 1487 4.57      
6 A' 1544 1411 6.34      
7 A' 1487 1358 5.72      
8 A' 1435 1311 29.50      
9 A' 1245 1137 19.21      
10 A' 1060 969 2.36      
11 A' 960 877 4.15      
12 A' 823 752 2.81      
13 A' 473 432 4.46      
14 A' 372 340 1.22      
15 A" 3402 3108 0.48      
16 A" 1626 1486 6.08      
17 A" 1052 961 4.95      
18 A" 652 596 16.41      
19 A" 473 432 1.78      
20 A" 75 69 0.01      
21 A" 271i 248i 21.88      

Unscaled Zero Point Vibrational Energy (zpe) 15743.9 cm-1
Scaled (by 0.9136) Zero Point Vibrational Energy (zpe) 14383.6 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/STO-3G
ABC
0.33642 0.29021 0.16061

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.156 0.000
O2 0.609 1.310 0.000
C3 -1.445 0.050 0.000
C4 0.805 -1.195 0.000
H5 -2.073 0.958 0.000
H6 -1.957 -0.929 0.000
H7 1.889 -0.983 0.000
H8 0.555 -1.795 0.897
H9 0.555 -1.795 -0.897

Atom - Atom Distances (Å)
  C1 O2 C3 C4 H5 H6 H7 H8 H9
C11.30431.44921.57262.22262.23812.20632.21812.2181
O21.30432.41012.51212.70513.40572.62593.23183.2318
C31.44922.41012.57101.10431.10443.49082.86512.8651
C41.57262.51212.57103.59382.77481.10521.10721.1072
H52.22262.70511.10433.59381.89064.41223.91053.9105
H62.23813.40571.10442.77481.89063.84712.80512.8051
H72.20632.62593.49081.10524.41223.84711.80051.8005
H82.21813.23182.86511.10723.91052.80511.80051.7931
H92.21813.23182.86511.10723.91052.80511.80051.7931

picture of Acetonyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 H5 120.413 C1 C3 H6 121.854
C1 C4 H7 109.726 C1 C4 H8 110.521
C1 C4 H9 110.521 O2 C1 C3 122.071
O2 C1 C4 121.382 C3 C1 C4 116.547
H5 C3 H6 117.733 H7 C4 H8 108.943
H7 C4 H9 108.943 H8 C4 H9 108.144
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.094      
2 O -0.148      
3 C -0.134      
4 C -0.252      
5 H 0.092      
6 H 0.087      
7 H 0.089      
8 H 0.086      
9 H 0.086      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.035 -1.385 0.000 1.729
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.194 -1.074 0.000
y -1.074 -23.316 0.000
z 0.000 0.000 -22.235
Traceless
 xyz
x 1.582 -1.074 0.000
y -1.074 -1.601 0.000
z 0.000 0.000 0.020
Polar
3z2-r20.039
x2-y22.122
xy-1.074
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.714 0.265 0.000
y 0.265 3.280 0.000
z 0.000 0.000 1.465


<r2> (average value of r2) Å2
<r2> 78.843
(<r2>)1/2 8.879