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

using model chemistry: QCISD/6-31G*

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

Conformer 2 (CS)

Jump to S1C1
Energy calculated at QCISD/6-31G*
 hartrees
Energy at 0K-115.575976
Energy at 298.15K-115.577581
HF Energy-115.191284
Nuclear repulsion energy57.759824
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/6-31G*
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' 3336 3176 0.08      
2 A' 3117 2969 57.44      
3 A' 1688 1607 0.43      
4 A' 1267 1206 9.54      
5 A' 1045 995 13.88      
6 A' 951 906 5.07      
7 A' 592 564 69.37      
8 A" 3289 3132 1.86      
9 A" 1072 1021 20.20      
10 A" 1019 970 4.90      
11 A" 849 809 0.42      
12 A" 723 689 36.24      

Unscaled Zero Point Vibrational Energy (zpe) 9473.5 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 9021.6 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/6-31G*
ABC
1.05558 0.88249 0.49508

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.037 0.892 0.000
H2 0.748 1.654 0.000
C3 -0.037 -0.420 0.659
C4 -0.037 -0.420 -0.659
H5 -0.040 -0.983 1.581
H6 -0.040 -0.983 -1.581

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6
C11.09411.46861.46862.45352.4535
H21.09412.31372.31373.17463.1746
C31.46862.31371.31771.08102.3100
C41.46862.31371.31772.31001.0810
H52.45353.17461.08102.31003.1629
H62.45353.17462.31001.08103.1629

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 63.344 C1 C3 H5 148.064
C1 C4 C3 63.344 C1 C4 H6 148.064
H2 C1 C3 128.468 H2 C1 C4 128.468
C3 C1 C4 53.311 C3 C4 H6 148.591
C4 C3 H5 148.591
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability