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

Conformer 2 (CS)

Jump to S1C1
Energy calculated at CCSD=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-115.766258
Energy at 298.15K-115.767938
HF Energy-115.236115
Nuclear repulsion energy58.269201
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 CCSD=FULL/aug-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' 3332 3168 1.51      
2 A' 3148 2993 36.96      
3 A' 1679 1597 1.65      
4 A' 1259 1197 6.04      
5 A' 998 949 17.50      
6 A' 948 902 2.47      
7 A' 631 600 69.09      
8 A" 3268 3108 3.11      
9 A" 1075 1022 21.78      
10 A" 1013 963 6.19      
11 A" 900 856 0.19      
12 A" 795 756 24.30      

Unscaled Zero Point Vibrational Energy (zpe) 9522.1 cm-1
Scaled (by 0.951) Zero Point Vibrational Energy (zpe) 9055.6 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 CCSD=FULL/aug-cc-pVTZ
ABC
1.07426 0.89841 0.50320

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.036 0.883 0.000
H2 0.725 1.651 0.000
C3 -0.036 -0.417 0.654
C4 -0.036 -0.417 -0.654
H5 -0.042 -0.974 1.567
H6 -0.042 -0.974 -1.567

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6
C11.08061.45561.45562.43002.4300
H21.08062.29832.29833.15153.1515
C31.45562.29831.30801.06952.2898
C41.45562.29831.30802.28981.0695
H52.43003.15151.06952.28983.1341
H62.43003.15152.28981.06953.1341

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 63.303 C1 C3 H5 148.071
C1 C4 C3 63.303 C1 C4 H6 148.071
H2 C1 C3 129.368 H2 C1 C4 129.368
C3 C1 C4 53.395 C3 C4 H6 148.624
C4 C3 H5 148.624
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability