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)/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)/CEP-31G*
 hartrees
Energy at 0K-19.701032
Energy at 298.15K-19.705127
HF Energy-19.320600
Nuclear repulsion energy35.344252
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)/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 3241 3057        
2 A1 3155 2976        
3 A1 3135 2957        
4 A1 1522 1436        
5 A1 1270 1198        
6 A1 1019 961        
7 A1 414 390        
8 A2 679 640        
9 A2 529 499        
10 B1 988 931        
11 B1 714 673        
12 B1 515 486        
13 B2 3234 3050        
14 B2 3136 2957        
15 B2 1517 1430        
16 B2 1400 1320        
17 B2 1190 1123        
18 B2 906 854        

Unscaled Zero Point Vibrational Energy (zpe) 14281.4 cm-1
Scaled (by 0.9431) Zero Point Vibrational Energy (zpe) 13468.8 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)/CEP-31G*
ABC
1.71936 0.33153 0.27794

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.468
H2 0.000 0.000 1.569
C3 0.000 1.253 -0.206
C4 0.000 -1.253 -0.206
H5 0.000 2.201 0.352
H6 0.000 -2.201 0.352
H7 0.000 1.300 -1.305
H8 0.000 -1.300 -1.305

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6 H7 H8
C11.10151.42251.42252.20422.20422.19852.1985
H21.10152.17282.17282.51552.51553.15473.1547
C31.42252.17282.50581.10003.49881.10032.7796
C41.42252.17282.50583.49881.10002.77961.1003
H52.20422.51551.10003.49884.40231.88603.8734
H62.20422.51553.49881.10004.40233.87341.8860
H72.19853.15471.10032.77961.88603.87342.6001
H82.19853.15472.77961.10033.87341.88602.6001

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 121.282 C1 C3 H7 120.721
C1 C4 H6 121.282 C1 C4 H8 120.721
H2 C1 C3 118.265 H2 C1 C4 118.265
C3 C1 C4 123.470 H5 C3 H7 117.997
H6 C4 H8 117.997
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability