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

using model chemistry: QCISD/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 QCISD/6-31G*
 hartrees
Energy at 0K-152.735735
Energy at 298.15K-152.737960
HF Energy-152.295551
Nuclear repulsion energy62.488819
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/6-31G*
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' 886 844 3.35      
2 A' 472 449 5.68      
3 A" 3170 3019 4.26      
4 A" 1510 1438 10.80      
5 A" 984 937 0.01      
6 A" 79 75 0.47      
7 A' 3166 3015 8.67      
8 A' 3072 2925 5.22      
9 A' 1907 1816 93.49      
10 A' 1512 1440 16.53      
11 A' 1412 1345 10.49      
12 A' 1083 1032 14.60      

Unscaled Zero Point Vibrational Energy (zpe) 9626.7 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 9167.5 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 QCISD/6-31G*
ABC
2.73542 0.32918 0.31094

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.980 -0.654 0.000
C2 0.000 0.508 0.000
O3 1.195 0.455 0.000
H4 -0.444 -1.611 0.000
H5 -1.620 -0.577 0.885
H6 -1.620 -0.577 -0.885

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6
C11.51982.44181.09671.09531.0953
C21.51981.19662.16512.14142.1414
O32.44181.19662.63823.12693.1269
H41.09672.16512.63821.79881.7988
H51.09532.14143.12691.79881.7702
H61.09532.14143.12691.79881.7702

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 127.627 C2 C1 H4 110.644
C2 C1 H5 108.858 C2 C1 H6 108.858
H4 C1 H5 110.297 H4 C1 H6 110.297
H5 C1 H6 107.819
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability