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

using model chemistry: QCISD/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 QCISD/6-31G
 hartrees
Energy at 0K-152.538479
Energy at 298.15K-152.540699
HF Energy-152.218197
Nuclear repulsion energy61.369877
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 QCISD/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' 862 830 9.39      
2 A' 460 443 7.59      
3 A" 3111 2997 6.98      
4 A" 1517 1462 11.98      
5 A" 1006 969 0.05      
6 A" 82 79 0.36      
7 A' 3100 2988 10.50      
8 A' 3012 2903 8.21      
9 A' 1537 1481 16.19      
10 A' 1507 1453 2.99      
11 A' 1425 1373 6.58      
12 A' 1097 1057 17.55      

Unscaled Zero Point Vibrational Energy (zpe) 9357.5 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 9016.9 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 QCISD/6-31G
ABC
2.70770 0.31646 0.29945

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.011 -0.642 0.000
C2 0.000 0.506 0.000
O3 1.233 0.444 0.000
H4 -0.496 -1.617 0.000
H5 -1.652 -0.560 0.891
H6 -1.652 -0.560 -0.891

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6
C11.52952.49361.10321.10091.1009
C21.52951.23502.18042.15882.1588
O32.49361.23502.69123.18303.1830
H41.10322.18042.69121.80261.8026
H51.10092.15883.18301.80261.7822
H61.10092.15883.18301.80261.7822

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 128.535 C2 C1 H4 110.790
C2 C1 H5 109.232 C2 C1 H6 109.232
H4 C1 H5 109.733 H4 C1 H6 109.733
H5 C1 H6 108.071
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability