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 C2H3 (vinyl)

using model chemistry: CCSD(T)=FULL/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at CCSD(T)=FULL/aug-cc-pVQZ
 hartrees
Energy at 0K-77.834988
Energy at 298.15K-77.836502
HF Energy-77.425377
Nuclear repulsion energy28.485134
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(T)=FULL/aug-cc-pVQZ
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' 3278 3141        
2 A' 3186 3052        
3 A' 3082 2953        
4 A' 1656 1587        
5 A' 1411 1351        
6 A' 1074 1028        
7 A' 726 696        
8 A" 933 894        
9 A" 826 792        

Unscaled Zero Point Vibrational Energy (zpe) 8085.5 cm-1
Scaled (by 0.958) Zero Point Vibrational Energy (zpe) 7745.9 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(T)=FULL/aug-cc-pVQZ
ABC
7.87731 1.09149 0.95866

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.049 0.721 0.000
C2 0.049 -0.587 0.000
H3 -0.678 1.514 0.000
H4 -0.880 -1.153 0.000
H5 0.965 -1.164 0.000

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5
C11.30731.07622.09192.0958
C21.30732.22291.08861.0829
H31.07622.22292.67503.1422
H42.09191.08862.67501.8455
H52.09581.08293.14221.8455

picture of vinyl state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 121.373 C1 C2 H5 122.237
C2 C1 H3 137.485 H4 C2 H5 116.389
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability