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)/6-31G*

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)/6-31G*
 hartrees
Energy at 0K-475.976444
Energy at 298.15K-475.980922
HF Energy-475.545855
Nuclear repulsion energy100.697618
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)/6-31G*
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 3157 3037        
2 A1 1544 1486        
3 A1 1172 1128        
4 A1 1082 1041        
5 A1 660 635        
6 A2 3235 3113        
7 A2 1220 1173        
8 A2 935 900        
9 B1 3248 3125        
10 B1 993 955        
11 B1 857 825        
12 B2 3153 3033        
13 B2 1515 1458        
14 B2 1108 1066        
15 B2 685 659        

Unscaled Zero Point Vibrational Energy (zpe) 12281.8 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 11816.3 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)/6-31G*
ABC
0.73167 0.35616 0.26510

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.870
C2 0.000 0.744 -0.798
C3 0.000 -0.744 -0.798
H4 -0.917 1.257 -1.085
H5 0.917 1.257 -1.085
H6 0.917 -1.257 -1.085
H7 -0.917 -1.257 -1.085

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82671.82672.49872.49872.49872.4987
C21.82671.48791.08921.08922.21942.2194
C31.82671.48792.21942.21941.08921.0892
H42.49871.08922.21941.83443.11152.5132
H52.49871.08922.21941.83442.51323.1115
H62.49872.21941.08923.11152.51321.8344
H72.49872.21941.08922.51323.11151.8344

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.967 S1 C2 H4 115.611
S1 C2 H5 115.611 S1 C3 C2 65.967
S1 C3 H6 115.611 S1 C3 H7 115.611
C2 S1 C3 48.065 C2 C3 H6 118.079
C2 C3 H7 118.079 C3 C2 H4 118.079
C3 C2 H5 118.079 H4 C2 H5 114.718
H6 C3 H7 114.718
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability