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

using model chemistry: mPW1PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at mPW1PW91/3-21G
 hartrees
Energy at 0K-152.285123
Energy at 298.15K-152.287403
HF Energy-152.285123
Nuclear repulsion energy62.247140
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 mPW1PW91/3-21G
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' 3157 3013 6.38      
2 A' 3066 2927 4.33      
3 A' 1876 1791 87.74      
4 A' 1521 1452 28.68      
5 A' 1421 1356 30.36      
6 A' 1074 1026 16.54      
7 A' 838 800 5.72      
8 A' 438 419 4.01      
9 A" 3160 3016 0.25      
10 A" 1523 1454 20.49      
11 A" 1003 957 1.74      
12 A" 126 120 3.01      

Unscaled Zero Point Vibrational Energy (zpe) 9601.7 cm-1
Scaled (by 0.9546) Zero Point Vibrational Energy (zpe) 9165.8 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 mPW1PW91/3-21G
ABC
2.89788 0.32116 0.30554

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.984 -0.667 0.000
C2 0.000 0.480 0.000
O3 1.204 0.489 0.000
H4 -0.483 -1.641 0.000
H5 -1.625 -0.572 0.882
H6 -1.625 -0.572 -0.882

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6
C11.51092.47471.09521.09431.0943
C21.51091.20442.17552.12692.1269
O32.47471.20442.71793.14763.1476
H41.09522.17552.71791.79551.7955
H51.09432.12693.14761.79551.7635
H61.09432.12693.14761.79551.7635

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 131.064 C2 C1 H4 112.198
C2 C1 H5 108.392 C2 C1 H6 108.392
H4 C1 H5 110.173 H4 C1 H6 110.173
H5 C1 H6 107.367
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.766      
2 C 0.370      
3 O -0.395      
4 H 0.253      
5 H 0.269      
6 H 0.269      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.148 -1.455 0.000 2.594
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.893 -0.165 0.000
y -0.165 -18.437 0.000
z 0.000 0.000 -16.738
Traceless
 xyz
x -1.306 -0.165 0.000
y -0.165 -0.621 0.000
z 0.000 0.000 1.927
Polar
3z2-r23.853
x2-y2-0.456
xy-0.165
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.880 0.435 0.000
y 0.435 2.819 0.000
z 0.000 0.000 2.333


<r2> (average value of r2) Å2
<r2> 45.047
(<r2>)1/2 6.712