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All results from a given calculation for C3H3 (cyclopropenyl radical)

using model chemistry: QCISD/6-311G*

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/6-311G*
Rotational Constants (cm-1) from geometry optimized at QCISD/6-311G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at QCISD/6-311G*
 hartrees
Energy at 0K-115.614213
Energy at 298.15K-115.615791
HF Energy-115.212405
Nuclear repulsion energy57.639976
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/6-311G*
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' 3306 3165 0.12      
2 A' 3088 2956 53.49      
3 A' 1654 1583 0.74      
4 A' 1243 1190 8.17      
5 A' 1019 975 17.54      
6 A' 933 893 6.30      
7 A' 596 571 79.51      
8 A" 3257 3118 2.98      
9 A" 1046 1002 23.37      
10 A" 994 952 4.49      
11 A" 848 812 0.38      
12 A" 675 646 51.87      

Unscaled Zero Point Vibrational Energy (zpe) 9328.8 cm-1
Scaled (by 0.9574) Zero Point Vibrational Energy (zpe) 8931.4 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/6-311G*
ABC
1.05295 0.87705 0.49278

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.037 0.896 0.000
H2 0.748 1.657 0.000
C3 -0.037 -0.421 0.660
C4 -0.037 -0.421 -0.660
H5 -0.040 -0.986 1.581
H6 -0.040 -0.986 -1.581

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6
C11.09371.47331.47332.45812.4581
H21.09372.31772.31773.17943.1794
C31.47332.31771.32041.08042.3114
C41.47332.31771.32042.31141.0804
H52.45813.17941.08042.31143.1622
H62.45813.17942.31141.08043.1622

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 63.378 C1 C3 H5 148.151
C1 C4 C3 63.378 C1 C4 H6 148.151
H2 C1 C3 128.479 H2 C1 C4 128.479
C3 C1 C4 53.243 C3 C4 H6 148.470
C4 C3 H5 148.470
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability