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

using model chemistry: MP2/6-31G(2df,p)

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 MP2/6-31G(2df,p)
Rotational Constants (cm-1) from geometry optimized at MP2/6-31G(2df,p)
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-115.635532
Energy at 298.15K-115.637308
HF Energy-115.207178
Nuclear repulsion energy57.948711
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 MP2/6-31G(2df,p)
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' 3374 3186 0.93      
2 A' 3162 2986 39.43      
3 A' 1639 1548 0.29      
4 A' 1266 1196 8.67      
5 A' 1031 974 16.66      
6 A' 949 896 6.04      
7 A' 641 605 54.53      
8 A" 5000 4722 81022.46      
9 A" 3045 2876 3876.92      
10 A" 1024 967 16.22      
11 A" 994 939 0.12      
12 A" 896 846 0.25      

Unscaled Zero Point Vibrational Energy (zpe) 11509.1 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 10870.4 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 MP2/6-31G(2df,p)
ABC
1.05618 0.89321 0.49849

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.037 0.887 0.000
H2 0.746 1.643 0.000
C3 -0.037 -0.418 0.660
C4 -0.037 -0.418 -0.660
H5 -0.038 -0.977 1.577
H6 -0.038 -0.977 -1.577

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6
C11.08841.46191.46192.44172.4417
H21.08842.30102.30103.15683.1568
C31.46192.30101.31921.07452.3054
C41.46192.30101.31922.30541.0745
H52.44173.15681.07452.30543.1537
H62.44173.15682.30541.07453.1537

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 63.181 C1 C3 H5 148.203
C1 C4 C3 63.181 C1 C4 H6 148.203
H2 C1 C3 128.305 H2 C1 C4 128.305
C3 C1 C4 53.638 C3 C4 H6 148.616
C4 C3 H5 148.616
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability