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

using model chemistry: CID/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 CID/3-21G
 hartrees
Energy at 0K-151.715362
Energy at 298.15K-151.717627
HF Energy-151.437787
Nuclear repulsion energy62.126552
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 CID/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' 3187 2969 6.46      
2 A' 3105 2893 3.18      
3 A' 2163 2015 468.76      
4 A' 1568 1461 22.12      
5 A' 1467 1367 24.16      
6 A' 1102 1027 24.71      
7 A' 803 748 5.23      
8 A' 454 423 4.68      
9 A" 3189 2971 1.92      
10 A" 1573 1465 15.47      
11 A" 1031 960 0.16      
12 A" 108 101 1.53      

Unscaled Zero Point Vibrational Energy (zpe) 9875.1 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 9199.7 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 CID/3-21G
ABC
2.87505 0.31837 0.30288

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.980 -0.692 0.000
C2 0.000 0.489 0.000
O3 1.196 0.511 0.000
H4 -0.454 -1.650 0.000
H5 -1.616 -0.609 0.885
H6 -1.616 -0.609 -0.885

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6
C11.53472.48651.09331.09241.0924
C21.53471.19612.18642.14462.1446
O32.48651.19612.71843.15333.1533
H41.09332.18642.71841.79341.7934
H51.09242.14463.15331.79341.7693
H61.09242.14463.15331.79341.7693

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 130.752 C2 C1 H4 111.496
C2 C1 H5 108.268 C2 C1 H6 108.268
H4 C1 H5 110.276 H4 C1 H6 110.276
H5 C1 H6 108.160
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability