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(T)=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(T)=FULL/cc-pVDZ
 hartrees
Energy at 0K-476.044814
Energy at 298.15K-476.049251
HF Energy-475.569873
Nuclear repulsion energy100.089489
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/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 3146 3030        
2 A1 1495 1440        
3 A1 1148 1106        
4 A1 1044 1006        
5 A1 648 624        
6 A2 3231 3113        
7 A2 1187 1144        
8 A2 891 859        
9 B1 3245 3126        
10 B1 954 919        
11 B1 831 801        
12 B2 3141 3025        
13 B2 1462 1408        
14 B2 1061 1022        
15 B2 668 644        

Unscaled Zero Point Vibrational Energy (zpe) 12076.2 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 11631.8 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(T)=FULL/cc-pVDZ
ABC
0.72332 0.35172 0.26205

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.875
C2 0.000 0.748 -0.804
C3 0.000 -0.748 -0.804
H4 -0.925 1.263 -1.089
H5 0.925 1.263 -1.089
H6 0.925 -1.263 -1.089
H7 -0.925 -1.263 -1.089

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.83821.83822.51182.51182.51182.5118
C21.83821.49551.09691.09692.23212.2321
C31.83821.49552.23212.23211.09691.0969
H42.51181.09692.23211.85083.13222.5270
H52.51181.09692.23211.85082.52703.1322
H62.51182.23211.09693.13222.52701.8508
H72.51182.23211.09692.52703.13221.8508

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.998 S1 C2 H4 115.349
S1 C2 H5 115.349 S1 C3 C2 65.998
S1 C3 H6 115.349 S1 C3 H7 115.349
C2 S1 C3 48.003 C2 C3 H6 118.045
C2 C3 H7 118.045 C3 C2 H4 118.045
C3 C2 H5 118.045 H4 C2 H5 115.050
H6 C3 H7 115.050
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability