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/6-311+G(3df,2p)

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/6-311+G(3df,2p)
 hartrees
Energy at 0K-77.734671
Energy at 298.15K-77.736195
HF Energy-77.418487
Nuclear repulsion energy28.431996
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/6-311+G(3df,2p)
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' 3270 3084 0.55      
2 A' 3199 3017 2.55      
3 A' 3096 2920 3.22      
4 A' 1655 1561 1.96      
5 A' 1412 1332 6.91      
6 A' 1080 1019 7.30      
7 A' 735 693 17.15      
8 A" 939 886 71.18      
9 A" 841 793 11.28      

Unscaled Zero Point Vibrational Energy (zpe) 8113.8 cm-1
Scaled (by 0.9431) Zero Point Vibrational Energy (zpe) 7652.1 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/6-311+G(3df,2p)
ABC
7.82849 1.08781 0.95510

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-311+G(3df,2p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.050 0.723 0.000
C2 0.050 -0.588 0.000
H3 -0.684 1.513 0.000
H4 -0.880 -1.155 0.000
H5 0.968 -1.164 0.000

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5
C11.31061.07842.09542.0983
C21.31062.22521.08931.0840
H31.07842.22522.67503.1456
H42.09541.08932.67501.8482
H52.09831.08403.14561.8482

picture of vinyl state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 121.372 C1 C2 H5 122.115
C2 C1 H3 137.112 H4 C2 H5 116.513
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability