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

using model chemistry: HF/CEP-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 HF/CEP-31G*
 hartrees
Energy at 0K-28.371812
Energy at 298.15K-28.374126
HF Energy-28.371812
Nuclear repulsion energy34.398281
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/CEP-31G*
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' 927 832 0.99      
2 A' 498 447 9.01      
3 A" 3329 2989 21.54      
4 A" 1589 1427 11.78      
5 A" 1036 930 0.34      
6 A" 96 87 0.01      
7 A' 3332 2992 25.73      
8 A' 3238 2908 14.57      
9 A' 2116 1900 275.48      
10 A' 1588 1426 18.23      
11 A' 1500 1347 4.26      
12 A' 1152 1035 17.61      

Unscaled Zero Point Vibrational Energy (zpe) 10200.9 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 9160.4 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/CEP-31G*
ABC
2.83651 0.32698 0.31011

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.911 -0.695 0.000
C2 0.000 0.537 0.000
O3 1.176 0.591 0.000
H4 -0.313 -1.606 0.000
H5 -1.549 -0.654 0.882
H6 -1.549 -0.654 -0.882

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6
C11.53192.45141.08981.08941.0894
C21.53191.17702.16552.14372.1437
O32.45141.17702.65453.12303.1230
H41.08982.16552.65451.79181.7918
H51.08942.14373.12301.79181.7646
H61.08942.14373.12301.79181.7646

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 129.161 C2 C1 H4 110.239
C2 C1 H5 108.556 C2 C1 H6 108.556
H4 C1 H5 110.620 H4 C1 H6 110.620
H5 C1 H6 108.179
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.186      
2 C -0.110      
3 O -0.123      
4 H 0.146      
5 H 0.137      
6 H 0.137      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.519 -1.567 0.000 2.967
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.646 -0.701 0.000
y -0.701 -18.653 0.000
z 0.000 0.000 -16.812
Traceless
 xyz
x -1.914 -0.701 0.000
y -0.701 -0.424 0.000
z 0.000 0.000 2.338
Polar
3z2-r24.676
x2-y2-0.994
xy-0.701
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.993 0.359 0.000
y 0.359 3.175 0.000
z 0.000 0.000 2.600


<r2> (average value of r2) Å2
<r2> 38.159
(<r2>)1/2 6.177