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 C3H3 (cyclopropenyl radical)

using model chemistry: CCD/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 (D3H)

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

Conformer 2 (CS)

Jump to S1C1
Energy calculated at CCD/6-31+G**
 hartrees
Energy at 0K-115.603014
Energy at 298.15K-115.604758
HF Energy-115.202559
Nuclear repulsion energy57.899883
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 CCD/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3385 3189 0.50      
2 A' 3177 2994 44.26      
3 A' 1697 1599 1.19      
4 A' 1273 1200 9.92      
5 A' 1035 976 11.66      
6 A' 960 904 5.60      
7 A' 587 553 87.63      
8 A" 3853 3631 17496.94      
9 A" 2832 2668 7725.58      
10 A" 1043 983 12.99      
11 A" 1023 964 0.96      
12 A" 855 806 0.23      

Unscaled Zero Point Vibrational Energy (zpe) 10859.8 cm-1
Scaled (by 0.9423) Zero Point Vibrational Energy (zpe) 10233.2 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 CCD/6-31+G**
ABC
1.05878 0.88843 0.49691

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.036 0.889 0.000
H2 0.732 1.658 0.000
C3 -0.036 -0.419 0.659
C4 -0.036 -0.419 -0.659
H5 -0.046 -0.979 1.577
H6 -0.046 -0.979 -1.577

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6
C11.08671.46471.46472.44392.4439
H21.08672.31042.31043.16913.1691
C31.46472.31041.31821.07462.3046
C41.46472.31041.31822.30461.0746
H52.44393.16911.07462.30463.1530
H62.44393.16912.30461.07463.1530

picture of cyclopropenyl radical state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C4 63.256 C1 C3 H5 148.114
C1 C4 C3 63.256 C1 C4 H6 148.114
H2 C1 C3 129.200 H2 C1 C4 129.200
C3 C1 C4 53.489 C3 C4 H6 148.621
C4 C3 H5 148.621
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability