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 CH3CO (Acetyl radical)

using model chemistry: CID/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at CID/6-31G
 hartrees
Energy at 0K-152.499295
Energy at 298.15K-152.501556
HF Energy-152.221911
Nuclear repulsion energy62.228554
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 CID/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' 3181 2974 8.82      
2 A' 3089 2889 3.32      
3 A' 2168 2028 760.77      
4 A' 1545 1445 23.22      
5 A' 1469 1374 23.07      
6 A' 1118 1046 29.33      
7 A' 893 835 1.12      
8 A' 478 447 7.18      
9 A" 3185 2979 3.54      
10 A" 1546 1445 15.91      
11 A" 1026 960 0.00      
12 A" 82 76 0.66      

Unscaled Zero Point Vibrational Energy (zpe) 9890.2 cm-1
Scaled (by 0.9352) Zero Point Vibrational Energy (zpe) 9249.3 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 CID/6-31G
ABC
2.82153 0.32269 0.30618

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.984 -0.667 0.000
C2 0.000 0.494 0.000
O3 1.202 0.480 0.000
H4 -0.462 -1.631 0.000
H5 -1.624 -0.587 0.885
H6 -1.624 -0.587 -0.885

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6
C11.52142.46781.09621.09501.0950
C21.52141.20162.17422.14182.1418
O32.46781.20162.68733.14683.1468
H41.09622.17422.68731.79511.7951
H51.09502.14183.14681.79511.7700
H61.09502.14183.14681.79511.7700

picture of Acetyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 129.620 C2 C1 H4 111.286
C2 C1 H5 108.801 C2 C1 H6 108.801
H4 C1 H5 110.011 H4 C1 H6 110.011
H5 C1 H6 107.850
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability