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

using model chemistry: ROHF/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 ROHF/3-21G
 hartrees
Energy at 0K-151.435264
Energy at 298.15K-151.437617
HF Energy-151.435264
Nuclear repulsion energy62.787839
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 ROHF/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' 875 794 2.15      
2 A' 481 436 8.26      
3 A" 3286 2980 1.65      
4 A" 1632 1480 18.58      
5 A" 1085 984 0.88      
6 A" 121 110 0.22      
7 A' 3290 2984 4.54      
8 A' 3210 2911 2.25      
9 A' 2052 1861 157.54      
10 A' 1628 1476 25.63      
11 A' 1544 1400 24.48      
12 A' 1171 1062 18.17      

Unscaled Zero Point Vibrational Energy (zpe) 10186.2 cm-1
Scaled (by 0.907) Zero Point Vibrational Energy (zpe) 9238.9 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 ROHF/3-21G
ABC
3.02201 0.32289 0.30822

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.968 -0.691 0.000
C2 0.000 0.472 0.000
O3 1.181 0.523 0.000
H4 -0.440 -1.636 0.000
H5 -1.600 -0.618 0.876
H6 -1.600 -0.618 -0.876

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6
C11.51312.46921.08271.08261.0826
C21.51311.18252.15282.12482.1248
O32.46921.18252.70023.13163.1316
H41.08272.15282.70021.77511.7751
H51.08262.12483.13161.77511.7522
H61.08262.12483.13161.77511.7522

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 132.309 C2 C1 H4 110.976
C2 C1 H5 108.748 C2 C1 H6 108.748
H4 C1 H5 110.127 H4 C1 H6 110.127
H5 C1 H6 108.045
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROHF/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.738      
2 C 0.480      
3 O -0.512      
4 H 0.254      
5 H 0.258      
6 H 0.258      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.659 -1.453 0.000 3.031
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.034 -0.596 0.000
y -0.596 -18.512 0.000
z 0.000 0.000 -16.927
Traceless
 xyz
x -2.314 -0.596 0.000
y -0.596 -0.032 0.000
z 0.000 0.000 2.346
Polar
3z2-r24.692
x2-y2-1.521
xy-0.596
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 45.023
(<r2>)1/2 6.710