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 C3H4 (cyclopropene)

using model chemistry: CCSD=FULL/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2v 1A1
Energy calculated at CCSD=FULL/cc-pVDZ
 hartrees
Energy at 0K-116.271164
Energy at 298.15K-116.274370
HF Energy-115.831029
Nuclear repulsion energy63.170491
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/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3334 3334 0.16      
2 A1 3094 3094 55.20      
3 A1 1718 1718 14.53      
4 A1 1522 1522 2.40      
5 A1 1187 1187 0.30      
6 A1 929 929 3.23      
7 A2 1018 1018 0.00      
8 A2 832 832 0.00      
9 B1 3168 3168 45.99      
10 B1 1105 1105 2.01      
11 B1 591 591 68.00      
12 B2 3289 3289 0.31      
13 B2 1082 1082 32.73      
14 B2 1044 1044 17.79      
15 B2 803 803 14.41      

Unscaled Zero Point Vibrational Energy (zpe) 12357.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12357.8 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/cc-pVDZ
ABC
0.98067 0.72021 0.45359

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.868
C2 0.000 0.656 -0.504
C3 0.000 -0.656 -0.504
H4 0.000 1.597 -1.050
H5 0.000 -1.597 -1.050
H6 0.923 0.000 1.469
H7 -0.923 0.000 1.469

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.52071.52072.49622.49621.10121.1012
C21.52071.31231.08812.31852.27472.2747
C31.52071.31232.31851.08812.27472.2747
H42.49621.08812.31853.19403.12253.1225
H52.49622.31851.08813.19403.12253.1225
H61.10122.27472.27473.12253.12251.8453
H71.10122.27472.27473.12253.12251.8453

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.437 C1 C2 H4 145.719
C1 C3 C2 64.437 C1 C3 H5 145.719
C2 C1 C3 51.125 C2 C1 H6 119.503
C2 C1 H7 119.503 C2 C3 H5 149.844
C3 C1 H6 119.503 C3 C1 H7 119.503
C3 C2 H4 149.844 H6 C1 H7 113.826
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability