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

using model chemistry: PBEPBE/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 PBEPBE/3-21G
 hartrees
Energy at 0K-152.146614
Energy at 298.15K-152.148847
HF Energy-152.146614
Nuclear repulsion energy61.622426
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 PBEPBE/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' 3055 3027 8.94      
2 A' 2962 2935 8.79      
3 A' 1771 1755 69.46      
4 A' 1472 1459 28.26      
5 A' 1360 1348 26.32      
6 A' 1028 1018 15.38      
7 A' 794 787 7.62      
8 A' 417 413 2.96      
9 A" 3063 3035 0.56      
10 A" 1472 1459 18.05      
11 A" 962 953 1.61      
12 A" 131 130 4.11      

Unscaled Zero Point Vibrational Energy (zpe) 9243.8 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 9159.7 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 PBEPBE/3-21G
ABC
2.80906 0.31600 0.30016

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.996 -0.666 0.000
C2 0.000 0.488 0.000
O3 1.220 0.481 0.000
H4 -0.500 -1.655 0.000
H5 -1.643 -0.563 0.889
H6 -1.643 -0.563 -0.889

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6
C11.52422.49471.10611.10421.1042
C21.52421.21992.20032.14322.1432
O32.49471.21992.74183.17403.1740
H41.10612.20032.74181.81321.8132
H51.10422.14323.17401.81321.7777
H61.10422.14323.17401.81321.7777

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 130.446 C2 C1 H4 112.576
C2 C1 H5 108.195 C2 C1 H6 108.195
H4 C1 H5 110.239 H4 C1 H6 110.239
H5 C1 H6 107.217
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.726      
2 C 0.328      
3 O -0.351      
4 H 0.236      
5 H 0.256      
6 H 0.256      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.938 -1.407 0.000 2.394
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.633 -0.047 0.000
y -0.047 -18.537 0.000
z 0.000 0.000 -16.810
Traceless
 xyz
x -0.960 -0.047 0.000
y -0.047 -0.816 0.000
z 0.000 0.000 1.775
Polar
3z2-r23.551
x2-y2-0.096
xy-0.047
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.021 0.515 0.000
y 0.515 2.972 0.000
z 0.000 0.000 2.388


<r2> (average value of r2) Å2
<r2> 45.630
(<r2>)1/2 6.755