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

using model chemistry: MP2=FULL/STO-3G

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 MP2=FULL/STO-3G
Rotational Constants (cm-1) from geometry optimized at MP2=FULL/STO-3G
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at MP2=FULL/STO-3G
 hartrees
Energy at 0K-113.927534
Energy at 298.15K-113.929249
HF Energy-113.754328
Nuclear repulsion energy56.786640
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 MP2=FULL/STO-3G
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' 3606 3205 8.72      
2 A' 3414 3034 7.40      
3 A' 1716 1525 0.30      
4 A' 1408 1252 12.64      
5 A' 1148 1021 7.48      
6 A' 1023 909 0.91      
7 A' 673 598 26.65      
8 A" 3594 3195 3.45      
9 A" 1510 1342 189.99      
10 A" 1149 1022 0.10      
11 A" 1066 948 0.33      
12 A" 931 828 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 10618.9 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 9439.2 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 MP2=FULL/STO-3G
ABC
1.02117 0.85007 0.47953

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.041 0.915 0.000
H2 0.797 1.638 0.000
C3 -0.041 -0.426 0.670
C4 -0.041 -0.426 -0.670
H5 -0.026 -1.007 1.597
H6 -0.026 -1.007 -1.597

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6
C11.10751.49881.49882.49902.4990
H21.10752.32652.32653.19793.1979
C31.49882.32651.34011.09432.3405
C41.49882.32651.34012.34051.0943
H52.49903.19791.09432.34053.1941
H62.49903.19792.34051.09433.1941

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 63.445 C1 C3 H5 148.636
C1 C4 C3 63.445 C1 C4 H6 148.636
H2 C1 C3 125.747 H2 C1 C4 125.747
C3 C1 C4 53.109 C3 C4 H6 147.901
C4 C3 H5 147.901
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability