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: QCISD(T)=FULL/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD(T)=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-476.269882
Energy at 298.15K-476.274332
HF Energy-475.612055
Nuclear repulsion energy101.224895
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 QCISD(T)=FULL/aug-cc-pVTZ
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 3158 3158        
2 A1 1504 1504        
3 A1 1144 1144        
4 A1 1047 1047        
5 A1 647 647        
6 A2 3213 3213        
7 A2 1202 1202        
8 A2 882 882        
9 B1 3228 3228        
10 B1 955 955        
11 B1 830 830        
12 B2 3151 3151        
13 B2 1477 1477        
14 B2 1068 1068        
15 B2 683 683        

Unscaled Zero Point Vibrational Energy (zpe) 12094.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12094.6 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 QCISD(T)=FULL/aug-cc-pVTZ
ABC
0.74009 0.35932 0.26774

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.866
C2 0.000 0.741 -0.797
C3 0.000 -0.741 -0.797
H4 -0.914 1.245 -1.071
H5 0.914 1.245 -1.071
H6 0.914 -1.245 -1.071
H7 -0.914 -1.245 -1.071

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82051.82052.47742.47742.47742.4774
C21.82051.48121.07911.07912.20292.2029
C31.82051.48122.20292.20291.07911.0791
H42.47741.07912.20291.82743.08872.4901
H52.47741.07912.20291.82742.49013.0887
H62.47742.20291.07913.08872.49011.8274
H72.47742.20291.07912.49013.08871.8274

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.995 S1 C2 H4 114.977
S1 C2 H5 114.977 S1 C3 C2 65.995
S1 C3 H6 114.977 S1 C3 H7 114.977
C2 S1 C3 48.009 C2 C3 H6 117.871
C2 C3 H7 117.871 C3 C2 H4 117.871
C3 C2 H5 117.871 H4 C2 H5 115.712
H6 C3 H7 115.712
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability