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: LSDA/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at LSDA/cc-pVDZ
 hartrees
Energy at 0K-152.356600
Energy at 298.15K-152.358846
HF Energy-152.356600
Nuclear repulsion energy62.930325
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 LSDA/cc-pVDZ
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' 3068 3034 7.69      
2 A' 2945 2913 9.77      
3 A' 1917 1896 136.86      
4 A' 1346 1331 25.86      
5 A' 1251 1238 25.57      
6 A' 1006 995 12.65      
7 A' 886 876 2.87      
8 A' 443 438 4.07      
9 A" 3080 3046 0.97      
10 A" 1341 1326 16.04      
11 A" 884 874 0.46      
12 A" 130 129 3.54      

Unscaled Zero Point Vibrational Energy (zpe) 9148.0 cm-1
Scaled (by 0.989) Zero Point Vibrational Energy (zpe) 9047.4 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 LSDA/cc-pVDZ
ABC
2.78114 0.33561 0.31734

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.967 -0.637 0.000
C2 0.000 0.491 0.000
O3 1.189 0.448 0.000
H4 -0.454 -1.625 0.000
H5 -1.627 -0.540 0.887
H6 -1.627 -0.540 -0.887

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6
C11.48602.41391.11311.10941.1094
C21.48601.18962.16402.12042.1204
O32.41391.18962.64523.11313.1131
H41.11312.16402.64521.82701.8270
H51.10942.12043.11311.82701.7736
H61.10942.12043.11311.82701.7736

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 128.556 C2 C1 H4 111.933
C2 C1 H5 108.706 C2 C1 H6 108.706
H4 C1 H5 110.582 H4 C1 H6 110.582
H5 C1 H6 106.135
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.174      
2 C -0.069      
3 O -0.066      
4 H 0.084      
5 H 0.113      
6 H 0.113      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.938 -1.305 0.000 2.337
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.254 -0.007 0.000
y -0.007 -18.677 0.000
z 0.000 0.000 -16.851
Traceless
 xyz
x -0.490 -0.007 0.000
y -0.007 -1.125 0.000
z 0.000 0.000 1.615
Polar
3z2-r23.230
x2-y20.423
xy-0.007
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.432 0.547 0.000
y 0.547 3.710 0.000
z 0.000 0.000 2.806


<r2> (average value of r2) Å2
<r2> 43.903
(<r2>)1/2 6.626