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

using model chemistry: HF/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 HF/3-21G
 hartrees
Energy at 0K-151.438514
Energy at 298.15K-151.440851
HF Energy-151.438514
Nuclear repulsion energy62.737863
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 HF/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' 3286 2976 5.25      
2 A' 3207 2904 2.93      
3 A' 2005 1816 121.71      
4 A' 1627 1474 25.52      
5 A' 1542 1397 23.45      
6 A' 1161 1051 16.38      
7 A' 863 782 3.12      
8 A' 480 435 8.15      
9 A" 3285 2975 1.83      
10 A" 1632 1478 18.15      
11 A" 1084 982 0.97      
12 A" 115 104 0.26      

Unscaled Zero Point Vibrational Energy (zpe) 10143.5 cm-1
Scaled (by 0.9056) Zero Point Vibrational Energy (zpe) 9186.0 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 HF/3-21G
ABC
3.01081 0.32262 0.30785

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.970 -0.690 0.000
C2 0.000 0.473 0.000
O3 1.183 0.521 0.000
H4 -0.444 -1.636 0.000
H5 -1.602 -0.616 0.876
H6 -1.602 -0.616 -0.876

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6
C11.51402.47011.08291.08271.0827
C21.51401.18432.15582.12562.1256
O32.47011.18432.70253.13313.1331
H41.08292.15582.70251.77451.7745
H51.08272.12563.13311.77451.7519
H61.08272.12563.13311.77451.7519

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 132.152 C2 C1 H4 111.139
C2 C1 H5 108.753 C2 C1 H6 108.753
H4 C1 H5 110.055 H4 C1 H6 110.055
H5 C1 H6 108.011
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.740      
2 C 0.476      
3 O -0.504      
4 H 0.253      
5 H 0.257      
6 H 0.257      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.616 -1.434 0.000 2.983
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.007 -0.583 0.000
y -0.583 -18.522 0.000
z 0.000 0.000 -16.940
Traceless
 xyz
x -2.276 -0.583 0.000
y -0.583 -0.048 0.000
z 0.000 0.000 2.324
Polar
3z2-r24.649
x2-y2-1.486
xy-0.583
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.733 0.382 0.000
y 0.382 2.703 0.000
z 0.000 0.000 2.254


<r2> (average value of r2) Å2
<r2> 45.060
(<r2>)1/2 6.713