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: ROHF/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at ROHF/cc-pVTZ
 hartrees
Energy at 0K-152.352530
Energy at 298.15K-152.354918
HF Energy-152.352530
Nuclear repulsion energy63.644373
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 ROHF/cc-pVTZ
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' 929 837 1.47      
2 A' 515 464 9.10      
3 A" 3254 2932 6.75      
4 A" 1578 1422 10.70      
5 A" 1039 936 0.06      
6 A" 122 110 0.00      
7 A' 3257 2935 10.79      
8 A' 3172 2858 5.79      
9 A' 2128 1918 267.03      
10 A' 1576 1420 18.95      
11 A' 1492 1344 8.56      
12 A' 1165 1049 16.63      

Unscaled Zero Point Vibrational Energy (zpe) 10113.5 cm-1
Scaled (by 0.901) Zero Point Vibrational Energy (zpe) 9112.3 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 ROHF/cc-pVTZ
ABC
2.96364 0.33508 0.31860

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.948 -0.686 0.000
C2 0.000 0.484 0.000
O3 1.156 0.509 0.000
H4 -0.396 -1.617 0.000
H5 -1.581 -0.621 0.875
H6 -1.581 -0.621 -0.875

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6
C11.50592.42031.08251.08171.0817
C21.50591.15642.13792.11802.1180
O32.42031.15642.63283.08803.0880
H41.08252.13792.63281.77821.7782
H51.08172.11803.08801.77821.7497
H61.08172.11803.08801.77821.7497

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 130.298 C2 C1 H4 110.301
C2 C1 H5 108.761 C2 C1 H6 108.761
H4 C1 H5 110.501 H4 C1 H6 110.501
H5 C1 H6 107.951
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROHF/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.225      
2 C 0.129      
3 O -0.237      
4 H 0.111      
5 H 0.111      
6 H 0.111      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.503 -1.383 0.000 2.860
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.516 -0.388 0.000
y -0.388 -18.489 -0.000
z 0.000 -0.000 -16.927
Traceless
 xyz
x -1.809 -0.388 0.000
y -0.388 -0.267 -0.000
z 0.000 -0.000 2.075
Polar
3z2-r24.151
x2-y2-1.028
xy-0.388
xz0.000
yz-0.000


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


<r2> (average value of r2) Å2
<r2> 43.904
(<r2>)1/2 6.626