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)/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2A2
Energy calculated at QCISD(T)/6-31G
 hartrees
Energy at 0K-116.712739
Energy at 298.15K-116.716934
HF Energy-116.427574
Nuclear repulsion energy64.000579
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)/6-31G
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 3207 3058        
2 A1 3111 2967        
3 A1 3095 2951        
4 A1 1544 1473        
5 A1 1281 1222        
6 A1 1036 988        
7 A1 432 412        
8 A2 748 713        
9 A2 534 509        
10 B1 969 924        
11 B1 758 722        
12 B1 517 493        
13 B2 3203 3054        
14 B2 3104 2961        
15 B2 1524 1453        
16 B2 1450 1383        
17 B2 1202 1147        
18 B2 955 911        

Unscaled Zero Point Vibrational Energy (zpe) 14333.5 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 13669.8 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 QCISD(T)/6-31G
ABC
1.77875 0.33434 0.28144

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.454
H2 0.000 0.000 1.552
C3 0.000 1.246 -0.200
C4 0.000 -1.246 -0.200
H5 0.000 2.188 0.355
H6 0.000 -2.188 0.355
H7 0.000 1.315 -1.293
H8 0.000 -1.315 -1.293

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6 H7 H8
C11.09851.40741.40742.18992.18992.18632.1863
H21.09852.15012.15012.49372.49373.13433.1343
C31.40742.15012.49291.09283.47881.09542.7849
C41.40742.15012.49293.47881.09282.78491.0954
H52.18992.49371.09283.47884.37541.86523.8711
H62.18992.49373.47881.09284.37543.87111.8652
H72.18633.13431.09542.78491.86523.87112.6298
H82.18633.13432.78491.09543.87111.86522.6298

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 121.804 C1 C3 H7 121.246
C1 C4 H6 121.804 C1 C4 H8 121.246
H2 C1 C3 117.665 H2 C1 C4 117.665
C3 C1 C4 124.671 H5 C3 H7 116.950
H6 C4 H8 116.950
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability