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-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 CCSD(T)=FULL/cc-pVTZ
 hartrees
Energy at 0K-476.249470
Energy at 298.15K-476.253938
HF Energy-475.610943
Nuclear repulsion energy101.238690
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-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 3166 3033        
2 A1 1512 1449        
3 A1 1151 1103        
4 A1 1057 1013        
5 A1 648 621        
6 A2 3228 3093        
7 A2 1205 1155        
8 A2 907 869        
9 B1 3243 3107        
10 B1 969 928        
11 B1 838 803        
12 B2 3162 3029        
13 B2 1487 1425        
14 B2 1083 1038        
15 B2 686 658        

Unscaled Zero Point Vibrational Energy (zpe) 12172.4 cm-1
Scaled (by 0.958) Zero Point Vibrational Energy (zpe) 11661.2 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-pVTZ
ABC
0.74025 0.35939 0.26771

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/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 -0.912 1.245 -1.071
H5 0.912 1.245 -1.071
H6 0.912 -1.245 -1.071
H7 -0.912 -1.245 -1.071

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82071.82072.47652.47652.47652.4765
C21.82071.48151.07761.07762.20242.2024
C31.82071.48152.20242.20241.07761.0776
H42.47651.07762.20241.82423.08702.4904
H52.47651.07762.20241.82422.49043.0870
H62.47652.20241.07763.08702.49041.8242
H72.47652.20241.07762.49043.08701.8242

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.993 S1 C2 H4 114.978
S1 C2 H5 114.978 S1 C3 C2 65.993
S1 C3 H6 114.978 S1 C3 H7 114.978
C2 S1 C3 48.014 C2 C3 H6 117.913
C2 C3 H7 117.913 C3 C2 H4 117.913
C3 C2 H5 117.913 H4 C2 H5 115.653
H6 C3 H7 115.653
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability