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/SDD

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/SDD
 hartrees
Energy at 0K-116.706423
Energy at 298.15K-116.710499
HF Energy-116.437958
Nuclear repulsion energy63.528329
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/SDD
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 3212 3064 45.97      
2 A1 3115 2970 6.60      
3 A1 3095 2952 21.39      
4 A1 1525 1454 4.26      
5 A1 1254 1196 0.02      
6 A1 1013 966 0.41      
7 A1 419 399 0.00      
8 A2 686 654 0.00      
9 A2 518 494 0.00      
10 B1 942 898 41.65      
11 B1 692 660 98.85      
12 B1 501 478 19.25      
13 B2 3204 3056 11.37      
14 B2 3094 2950 20.28      
15 B2 1507 1437 3.04      
16 B2 1422 1356 3.61      
17 B2 1176 1122 0.26      
18 B2 928 885 0.57      

Unscaled Zero Point Vibrational Energy (zpe) 14151.3 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 13496.1 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/SDD
ABC
1.75983 0.32821 0.27662

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/SDD

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.456
H2 0.000 0.000 1.557
C3 0.000 1.259 -0.202
C4 0.000 -1.259 -0.202
H5 0.000 2.199 0.362
H6 0.000 -2.199 0.362
H7 0.000 1.328 -1.298
H8 0.000 -1.328 -1.298

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6 H7 H8
C11.10071.42091.42092.20152.20152.20022.2002
H21.10072.16332.16332.50312.50313.14883.1488
C31.42092.16332.51861.09643.50441.09832.8096
C41.42092.16332.51863.50441.09642.80961.0983
H52.20152.50311.09643.50444.39891.87533.8984
H62.20152.50313.50441.09644.39893.89841.8753
H72.20023.14881.09832.80961.87533.89842.6554
H82.20023.14882.80961.09833.89841.87532.6554

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 121.441 C1 C3 H7 121.167
C1 C4 H6 121.441 C1 C4 H8 121.167
H2 C1 C3 117.596 H2 C1 C4 117.596
C3 C1 C4 124.808 H5 C3 H7 117.392
H6 C4 H8 117.392
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability