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: HF/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A"
Energy calculated at HF/CEP-121G*
 hartrees
Energy at 0K-35.045313
Energy at 298.15K-35.050110
HF Energy-35.045313
Nuclear repulsion energy61.470365
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 HF/CEP-121G*
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' 3424 3094 9.00      
2 A' 3306 2987 18.36      
3 A' 3303 2984 9.31      
4 A' 3193 2884 17.25      
5 A' 1611 1455 10.64      
6 A' 1603 1448 36.08      
7 A' 1547 1397 11.65      
8 A' 1511 1365 2.64      
9 A' 1328 1200 55.76      
10 A' 1134 1025 2.43      
11 A' 989 894 13.83      
12 A' 871 787 0.02      
13 A' 552 498 18.27      
14 A' 400 361 2.50      
15 A" 3254 2940 33.80      
16 A" 1612 1456 7.77      
17 A" 1118 1010 1.07      
18 A" 728 658 48.23      
19 A" 536 484 0.62      
20 A" 440 397 0.25      
21 A" 58 52 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 16257.7 cm-1
Scaled (by 0.9034) Zero Point Vibrational Energy (zpe) 14687.2 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 HF/CEP-121G*
ABC
0.36802 0.29832 0.16992

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.141 0.000
O2 0.486 1.275 0.000
C3 -1.436 -0.023 0.000
C4 0.892 -1.094 0.000
H5 -2.060 0.853 0.000
H6 -1.895 -0.998 0.000
H7 1.931 -0.788 0.000
H8 0.699 -1.706 0.878
H9 0.699 -1.706 -0.878

Atom - Atom Distances (Å)
  C1 O2 C3 C4 H5 H6 H7 H8 H9
C11.23411.44501.52332.17942.21042.14272.16112.1611
O21.23412.31932.40382.58063.29152.51923.11523.1152
C31.44502.31932.56181.07601.07703.45212.85642.8564
C41.52332.40382.56183.53592.78801.08281.08721.0872
H52.17942.58061.07603.53591.85814.31493.86413.8641
H62.21043.29151.07702.78801.85813.83092.82842.8284
H72.14272.51923.45211.08284.31493.83091.76861.7686
H82.16113.11522.85641.08723.86412.82841.76861.7554
H92.16113.11522.85641.08723.86412.82841.76861.7554

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 118.930 C1 C3 H6 121.752
C1 C4 H7 109.450 C1 C4 H8 110.654
C1 C4 H9 110.654 O2 C1 C3 119.721
O2 C1 C4 120.975 C3 C1 C4 119.304
H5 C3 H6 119.318 H7 C4 H8 109.188
H7 C4 H9 109.188 H8 C4 H9 107.668
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.421      
2 O -0.325      
3 C -0.429      
4 C -0.629      
5 H 0.207      
6 H 0.203      
7 H 0.203      
8 H 0.174      
9 H 0.174      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.337 -2.673 0.000 2.989
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.714 -1.664 0.000
y -1.664 -26.885 0.000
z 0.000 0.000 -24.709
Traceless
 xyz
x 3.083 -1.664 0.000
y -1.664 -3.173 0.000
z 0.000 0.000 0.090
Polar
3z2-r20.180
x2-y24.170
xy-1.664
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.762 0.582 0.000
y 0.582 6.022 0.000
z 0.000 0.000 3.633


<r2> (average value of r2) Å2
<r2> 65.184
(<r2>)1/2 8.074