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All results from a given calculation for CH3CO (Acetyl radical)

using model chemistry: QCISD(T)/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at QCISD(T)/6-31+G**
 hartrees
Energy at 0K-152.784623
Energy at 298.15K-152.786859
HF Energy-152.306061
Nuclear repulsion energy62.488155
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 QCISD(T)/6-31+G**
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' 876 823        
2 A' 470 441        
3 A" 3194 2999        
4 A" 1496 1404        
5 A" 973 914        
6 A" 86 81        
7 A' 3188 2994        
8 A' 3083 2895        
9 A' 1880 1765        
10 A' 1498 1406        
11 A' 1397 1312        
12 A' 1068 1003        

Unscaled Zero Point Vibrational Energy (zpe) 9604.5 cm-1
Scaled (by 0.939) Zero Point Vibrational Energy (zpe) 9018.6 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 QCISD(T)/6-31+G**
ABC
2.74641 0.32881 0.31065

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.983 -0.653 0.000
C2 0.000 0.506 0.000
O3 1.198 0.453 0.000
H4 -0.450 -1.607 0.000
H5 -1.618 -0.568 0.883
H6 -1.618 -0.568 -0.883

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6
C11.51942.44511.09291.09071.0907
C21.51941.19912.16042.13342.1334
O32.44511.19912.63823.12293.1229
H41.09292.16042.63821.79501.7950
H51.09072.13343.12291.79501.7652
H61.09072.13343.12291.79501.7652

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 127.774 C2 C1 H4 110.528
C2 C1 H5 108.527 C2 C1 H6 108.527
H4 C1 H5 110.578 H4 C1 H6 110.578
H5 C1 H6 108.025
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability