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(T)=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(T)=FULL/CEP-31G
 hartrees
Energy at 0K-19.533944
Energy at 298.15K-19.537993
HF Energy-19.277136
Nuclear repulsion energy34.949415
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(T)=FULL/CEP-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 A1 3189 3189        
2 A1 3095 3095        
3 A1 3074 3074        
4 A1 1508 1508        
5 A1 1250 1250        
6 A1 1001 1001        
7 A1 410 410        
8 A2 664 664        
9 A2 513 513        
10 B1 956 956        
11 B1 691 691        
12 B1 499 499        
13 B2 3181 3181        
14 B2 3078 3078        
15 B2 1494 1494        
16 B2 1399 1399        
17 B2 1179 1179        
18 B2 910 910        

Unscaled Zero Point Vibrational Energy (zpe) 14045.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 14045.4 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 CCSD(T)=FULL/CEP-31G
ABC
1.69543 0.32178 0.27045

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.471
H2 0.000 0.000 1.580
C3 0.000 1.272 -0.208
C4 0.000 -1.272 -0.208
H5 0.000 2.225 0.356
H6 0.000 -2.225 0.356
H7 0.000 1.329 -1.314
H8 0.000 -1.329 -1.314

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6 H7 H8
C11.10881.44201.44202.22772.22772.22482.2248
H21.10882.19412.19412.53902.53903.18383.1838
C31.44202.19412.54471.10693.54241.10732.8263
C41.44202.19412.54473.54241.10692.82631.1073
H52.22772.53901.10693.54244.44961.89523.9262
H62.22772.53903.54241.10694.44963.92621.8952
H72.22483.18381.10732.82631.89523.92622.6571
H82.22483.18382.82631.10733.92621.89522.6571

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 121.292 C1 C3 H7 120.982
C1 C4 H6 121.292 C1 C4 H8 120.982
H2 C1 C3 118.073 H2 C1 C4 118.073
C3 C1 C4 123.853 H5 C3 H7 117.725
H6 C4 H8 117.725
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability