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: CCD/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at CCD/cc-pVDZ
 hartrees
Energy at 0K-152.764221
Energy at 298.15K-152.766492
HF Energy-152.310464
Nuclear repulsion energy62.556470
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 CCD/cc-pVDZ
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' 877 839 3.12      
2 A' 469 449 4.94      
3 A" 3186 3048 2.79      
4 A" 1465 1402 9.96      
5 A" 956 914 0.10      
6 A" 108 103 0.87      
7 A' 3180 3043 7.75      
8 A' 3072 2939 6.33      
9 A' 2010 1923 141.57      
10 A' 1463 1400 15.88      
11 A' 1362 1303 7.82      
12 A' 1053 1007 17.25      

Unscaled Zero Point Vibrational Energy (zpe) 9600.2 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 9184.5 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 CCD/cc-pVDZ
ABC
2.74007 0.32875 0.31086

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.969 -0.674 0.000
C2 0.000 0.507 0.000
O3 1.183 0.479 0.000
H4 -0.421 -1.633 0.000
H5 -1.614 -0.598 0.891
H6 -1.614 -0.598 -0.891

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6
C11.52842.44191.10441.10261.1026
C21.52841.18352.18102.14972.1497
O32.44191.18352.65143.12703.1270
H41.10442.18102.65141.81381.8138
H51.10262.14973.12701.81381.7822
H61.10262.14973.12701.81381.7822

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 127.974 C2 C1 H4 110.839
C2 C1 H5 108.498 C2 C1 H6 108.498
H4 C1 H5 110.540 H4 C1 H6 110.540
H5 C1 H6 107.834
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability