return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: M06-2X/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at M06-2X/6-31G*
 hartrees
Energy at 0K-153.103712
Energy at 298.15K-153.105910
HF Energy-153.103712
Nuclear repulsion energy62.906180
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 M06-2X/6-31G*
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' 3179 3011 5.02      
2 A' 3081 2917 3.32      
3 A' 2017 1910 137.87      
4 A' 1488 1409 19.07      
5 A' 1378 1305 11.59      
6 A' 1054 998 16.22      
7 A' 868 822 4.12      
8 A' 462 438 5.77      
9 A" 3182 3014 1.06      
10 A" 1487 1408 11.98      
11 A" 958 907 0.09      
12 A" 78 74 1.00      

Unscaled Zero Point Vibrational Energy (zpe) 9615.9 cm-1
Scaled (by 0.947) Zero Point Vibrational Energy (zpe) 9106.3 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 M06-2X/6-31G*
ABC
2.74489 0.33380 0.31504

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.967 -0.661 0.000
C2 0.000 0.509 0.000
O3 1.181 0.461 0.000
H4 -0.429 -1.614 0.000
H5 -1.608 -0.584 0.882
H6 -1.608 -0.584 -0.882

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6
C11.51812.42341.09411.09261.0926
C21.51811.18182.16572.13482.1348
O32.42341.18182.62613.10583.1058
H41.09412.16572.62611.79651.7965
H51.09262.13483.10581.79651.7632
H61.09262.13483.10581.79651.7632

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 127.247 C2 C1 H4 110.971
C2 C1 H5 108.613 C2 C1 H6 108.613
H4 C1 H5 110.485 H4 C1 H6 110.485
H5 C1 H6 107.577
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.574      
2 C 0.282      
3 O -0.319      
4 H 0.198      
5 H 0.207      
6 H 0.207      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.081 -1.285 0.000 2.446
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.719 -0.152 0.000
y -0.152 -18.305 0.000
z 0.000 0.000 -16.740
Traceless
 xyz
x -1.196 -0.152 0.000
y -0.152 -0.576 0.000
z 0.000 0.000 1.772
Polar
3z2-r23.544
x2-y2-0.413
xy-0.152
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.137 0.366 0.000
y 0.366 3.151 0.000
z 0.000 0.000 2.620


<r2> (average value of r2) Å2
<r2> 44.033
(<r2>)1/2 6.636