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(TQ)=FULL/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes CS 2A"

Conformer 1 (C2V)

Jump to S1C2
Vibrational Frequencies calculated at QCISD(TQ)=FULL/6-31+G**
Rotational Constants (cm-1) from geometry optimized at QCISD(TQ)=FULL/6-31+G**
See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(TQ)=FULL/6-31+G**
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at QCISD(TQ)=FULL/6-31+G**
 hartrees
Energy at 0K-116.936634
Energy at 298.15K 
HF Energy-116.481419
Nuclear repulsion energy64.717213
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(TQ)=FULL/6-31+G**
Rotational Constants (cm-1) from geometry optimized at QCISD(TQ)=FULL/6-31+G**
ABC
1.80223 0.34315 0.28826

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(TQ)=FULL/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.453 0.000
H2 0.002 1.539 0.000
C3 -1.231 -0.199 0.000
C4 1.231 -0.200 0.000
H5 -2.161 0.352 0.000
H6 2.161 0.350 0.000
H7 -1.288 -1.280 0.000
H8 1.288 -1.282 0.000

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6 H7 H8
C11.08601.39291.39322.16362.16382.15912.1604
H21.08602.13052.12942.46692.46553.09993.0999
C31.39292.13052.46191.08113.43661.08302.7422
C41.39322.12942.46193.43671.08092.74031.0830
H52.16362.46691.08113.43674.32271.85173.8169
H62.16382.46553.43661.08094.32273.81481.8503
H72.15913.09991.08302.74031.85173.81482.5758
H82.16043.09992.74221.08303.81691.85032.5758

picture of Allyl radical state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 H5 121.465 C1 C3 H7 120.874
C1 C4 H6 121.485 C1 C4 H8 120.981
H2 C1 C3 117.971 H2 C1 C4 117.858
C3 C1 C4 124.171 H5 C3 H7 117.661
H6 C4 H8 117.534
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability