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: B3LYP/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at B3LYP/TZVP
 hartrees
Energy at 0K-153.241448
Energy at 298.15K-153.243707
HF Energy-153.241448
Nuclear repulsion energy63.010004
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 B3LYP/TZVP
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' 850 820 5.58      
2 A' 472 456 5.39      
3 A" 3118 3011 1.50      
4 A" 1457 1406 14.51      
5 A" 957 924 0.08      
6 A" 104 100 1.25      
7 A' 3113 3005 9.04      
8 A' 3022 2917 9.27      
9 A' 1927 1861 159.66      
10 A' 1460 1410 22.14      
11 A' 1363 1316 16.43      
12 A' 1053 1016 16.50      

Unscaled Zero Point Vibrational Energy (zpe) 9447.3 cm-1
Scaled (by 0.9654) Zero Point Vibrational Energy (zpe) 9120.4 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 B3LYP/TZVP
ABC
2.83214 0.33251 0.31486

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.964 -0.665 0.000
C2 0.000 0.495 0.000
O3 1.180 0.476 0.000
H4 -0.437 -1.623 0.000
H5 -1.607 -0.583 0.878
H6 -1.607 -0.583 -0.878

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6
C11.50842.42871.09361.09121.0912
C21.50841.17992.16262.12462.1246
O32.42871.17992.64943.10743.1074
H41.09362.16262.64941.79491.7949
H51.09122.12463.10741.79491.7564
H61.09122.12463.10741.79491.7564

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 128.818 C2 C1 H4 111.431
C2 C1 H5 108.570 C2 C1 H6 108.570
H4 C1 H5 110.476 H4 C1 H6 110.476
H5 C1 H6 107.189
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability