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

using model chemistry: CISD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at CISD/3-21G
 hartrees
Energy at 0K-151.720058
Energy at 298.15K-151.722319
HF Energy-151.437500
Nuclear repulsion energy61.997392
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 CISD/3-21G
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 2994 6.68      
2 A' 3100 2918 3.37      
3 A' 2079 1957 336.32      
4 A' 1567 1475 21.91      
5 A' 1464 1379 22.43      
6 A' 1100 1035 21.94      
7 A' 800 753 5.30      
8 A' 452 426 4.50      
9 A" 3184 2997 2.16      
10 A" 1571 1479 15.01      
11 A" 1029 968 0.22      
12 A" 108 101 1.30      

Unscaled Zero Point Vibrational Energy (zpe) 9816.8 cm-1
Scaled (by 0.9413) Zero Point Vibrational Energy (zpe) 9240.5 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 CISD/3-21G
ABC
2.86465 0.31722 0.30173

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.985 -0.689 0.000
C2 0.000 0.490 0.000
O3 1.201 0.507 0.000
H4 -0.459 -1.648 0.000
H5 -1.620 -0.606 0.885
H6 -1.620 -0.606 -0.885

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6
C11.53582.49151.09361.09251.0925
C21.53581.20122.18612.14662.1466
O32.49151.20122.71983.15903.1590
H41.09362.18612.71981.79351.7935
H51.09252.14663.15901.79351.7701
H61.09252.14663.15901.79351.7701

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 130.697 C2 C1 H4 111.380
C2 C1 H5 108.333 C2 C1 H6 108.333
H4 C1 H5 110.248 H4 C1 H6 110.248
H5 C1 H6 108.209
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability