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 C3H5 (Allyl radical)

using model chemistry: CCSD=FULL/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2A2
Energy calculated at CCSD=FULL/CEP-31G
 hartrees
Energy at 0K-19.528206
Energy at 298.15K-19.532285
HF Energy-19.277472
Nuclear repulsion energy34.988942
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 CCSD=FULL/CEP-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3200 3200 73.78      
2 A1 3110 3110 4.93      
3 A1 3087 3087 30.21      
4 A1 1513 1513 2.78      
5 A1 1255 1255 0.06      
6 A1 1006 1006 0.22      
7 A1 412 412 0.00      
8 A2 679 679 0.00      
9 A2 518 518 0.00      
10 B1 966 966 43.95      
11 B1 708 708 128.55      
12 B1 504 504 20.51      
13 B2 3192 3192 23.24      
14 B2 3090 3090 33.39      
15 B2 1499 1499 1.33      
16 B2 1404 1404 3.54      
17 B2 1180 1180 0.18      
18 B2 914 914 0.16      

Unscaled Zero Point Vibrational Energy (zpe) 14118.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 14118.6 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 CCSD=FULL/CEP-31G
ABC
1.70100 0.32248 0.27109

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.470
H2 0.000 0.000 1.577
C3 0.000 1.271 -0.207
C4 0.000 -1.271 -0.207
H5 0.000 2.222 0.357
H6 0.000 -2.222 0.357
H7 0.000 1.329 -1.312
H8 0.000 -1.329 -1.312

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6 H7 H8
C11.10741.44001.44002.22522.22522.22282.2228
H21.10742.19082.19082.53562.53563.18023.1802
C31.44002.19082.54171.10603.53841.10622.8246
C41.44002.19082.54173.53841.10602.82461.1062
H52.22522.53561.10603.53844.44471.89263.9236
H62.22522.53563.53841.10604.44473.92361.8926
H72.22283.18021.10622.82461.89263.92362.6576
H82.22283.18022.82461.10623.92361.89262.6576

picture of Allyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 H5 121.307 C1 C3 H7 121.053
C1 C4 H6 121.307 C1 C4 H8 121.053
H2 C1 C3 118.049 H2 C1 C4 118.049
C3 C1 C4 123.901 H5 C3 H7 117.640
H6 C4 H8 117.640
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability