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: QCISD(T)/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2A2
Energy calculated at QCISD(T)/CEP-121G
 hartrees
Energy at 0K-19.570219
Energy at 298.15K-19.574221
HF Energy-19.285931
Nuclear repulsion energy35.257794
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(T)/CEP-121G
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 3136 2991        
2 A1 3040 2900        
3 A1 3020 2880        
4 A1 1506 1436        
5 A1 1240 1182        
6 A1 999 953        
7 A1 417 398        
8 A2 640 610        
9 A2 501 478        
10 B1 896 854        
11 B1 614 586        
12 B1 482 460        
13 B2 3130 2985        
14 B2 3018 2878        
15 B2 1488 1420        
16 B2 1396 1331        
17 B2 1155 1102        
18 B2 925 882        

Unscaled Zero Point Vibrational Energy (zpe) 13801.3 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 13162.3 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(T)/CEP-121G
ABC
1.73412 0.32736 0.27537

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.463
H2 0.000 0.000 1.566
C3 0.000 1.261 -0.204
C4 0.000 -1.261 -0.204
H5 0.000 2.206 0.355
H6 0.000 -2.206 0.355
H7 0.000 1.322 -1.303
H8 0.000 -1.322 -1.303

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6 H7 H8
C11.10241.42681.42682.20842.20842.20622.2062
H21.10242.17322.17322.51612.51613.15873.1587
C31.42682.17322.52221.09783.51161.10062.8070
C41.42682.17322.52223.51161.09782.80701.1006
H52.20842.51611.09783.51164.41151.87903.8979
H62.20842.51613.51161.09784.41153.89791.8790
H72.20623.15871.10062.80701.87903.89792.6437
H82.20623.15872.80701.10063.89791.87902.6437

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 121.484 C1 C3 H7 121.059
C1 C4 H6 121.484 C1 C4 H8 121.059
H2 C1 C3 117.893 H2 C1 C4 117.893
C3 C1 C4 124.215 H5 C3 H7 117.457
H6 C4 H8 117.457
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability