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: QCISD/cc-pVDZ

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 QCISD/cc-pVDZ
Rotational Constants (cm-1) from geometry optimized at QCISD/cc-pVDZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVDZ
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at QCISD/cc-pVDZ
 hartrees
Energy at 0K-115.601597
Energy at 298.15K-115.603149
HF Energy-115.201651
Nuclear repulsion energy57.220094
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/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3319 3184 0.36      
2 A' 3106 2980 53.40      
3 A' 1656 1588 0.68      
4 A' 1242 1192 8.35      
5 A' 1009 969 16.17      
6 A' 923 886 4.13      
7 A' 601 577 62.11      
8 A" 3269 3136 9.83      
9 A" 1041 999 18.33      
10 A" 984 944 2.95      
11 A" 853 818 0.19      
12 A" 615 590 68.08      

Unscaled Zero Point Vibrational Energy (zpe) 9309.6 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 8931.7 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/cc-pVDZ
ABC
1.03571 0.86610 0.48593

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.038 0.901 0.000
H2 0.757 1.667 0.000
C3 -0.038 -0.424 0.666
C4 -0.038 -0.424 -0.666
H5 -0.038 -0.994 1.594
H6 -0.038 -0.994 -1.594

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6
C11.10391.48261.48262.47672.4767
H21.10392.33352.33353.20233.2023
C31.48262.33351.33101.08992.3306
C41.48262.33351.33102.33061.0899
H52.47673.20231.08992.33063.1882
H62.47673.20232.33061.08993.1882

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 63.328 C1 C3 H5 148.246
C1 C4 C3 63.328 C1 C4 H6 148.246
H2 C1 C3 128.295 H2 C1 C4 128.295
C3 C1 C4 53.345 C3 C4 H6 148.426
C4 C3 H5 148.426
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability