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: MP2/cc-pVTZ

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

Conformer 2 (CS)

Jump to S1C1
Energy calculated at MP2/cc-pVTZ
 hartrees
Energy at 0K-115.684043
Energy at 298.15K-115.685790
HF Energy-115.234129
Nuclear repulsion energy57.993885
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/cc-pVTZ
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' 3339 3170 0.88      
2 A' 3135 2976 42.11      
3 A' 1625 1543 0.67      
4 A' 1253 1190 6.99      
5 A' 1009 958 17.56      
6 A' 930 883 6.39      
7 A' 608 577 64.59      
8 A" 3972 3772 22392.18      
9 A" 2868 2723 6114.54      
10 A" 1012 961 16.75      
11 A" 990 940 0.16      
12 A" 875 831 0.26      

Unscaled Zero Point Vibrational Energy (zpe) 10807.5 cm-1
Scaled (by 0.9495) Zero Point Vibrational Energy (zpe) 10261.7 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 MP2/cc-pVTZ
ABC
1.05779 0.89491 0.49904

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.037 0.886 0.000
H2 0.738 1.647 0.000
C3 -0.037 -0.417 0.659
C4 -0.037 -0.417 -0.659
H5 -0.039 -0.978 1.575
H6 -0.039 -0.978 -1.575

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6
C11.08591.46031.46032.44012.4401
H21.08592.30092.30093.15793.1579
C31.46032.30091.31891.07382.3041
C41.46032.30091.31892.30411.0738
H52.44013.15791.07382.30413.1508
H62.44013.15792.30411.07383.1508

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 63.154 C1 C3 H5 148.309
C1 C4 C3 63.154 C1 C4 H6 148.309
H2 C1 C3 128.691 H2 C1 C4 128.691
C3 C1 C4 53.692 C3 C4 H6 148.537
C4 C3 H5 148.537
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability