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 C2H4S (Thiirane)

using model chemistry: CCSD/cc-pVQZ

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/cc-pVQZ
 hartrees
Energy at 0K-476.195528
Energy at 298.15K 
HF Energy-475.620345
Nuclear repulsion energy101.522115
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/cc-pVQZ
Rotational Constants (cm-1) from geometry optimized at CCSD/cc-pVQZ
ABC
0.74053 0.36285 0.26967

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.861
C2 0.000 0.740 -0.793
C3 0.000 -0.740 -0.793
H4 -0.912 1.247 -1.068
H5 0.912 1.247 -1.068
H6 0.912 -1.247 -1.068
H7 -0.912 -1.247 -1.068

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.81201.81202.47192.47192.47192.4719
C21.81201.48001.07941.07942.20352.2035
C31.81201.48002.20352.20351.07941.0794
H42.47191.07942.20351.82473.08992.4935
H52.47191.07942.20351.82472.49353.0899
H62.47192.20351.07943.08992.49351.8247
H72.47192.20351.07942.49353.08991.8247

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.896 S1 C2 H4 115.139
S1 C2 H5 115.139 S1 C3 C2 65.896
S1 C3 H6 115.139 S1 C3 H7 115.139
C2 S1 C3 48.208 C2 C3 H6 118.001
C2 C3 H7 118.001 C3 C2 H4 118.001
C3 C2 H5 118.001 H4 C2 H5 115.390
H6 C3 H7 115.390
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability