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: CID/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CID/3-21G*
 hartrees
Energy at 0K-473.564005
Energy at 298.15K-473.568514
HF Energy-473.262302
Nuclear repulsion energy100.630725
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 CID/3-21G*
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 3226 3001 6.81      
2 A1 1585 1475 3.65      
3 A1 1172 1090 0.05      
4 A1 1082 1007 3.87      
5 A1 631 587 24.40      
6 A2 3301 3072 0.00      
7 A2 1261 1173 0.00      
8 A2 947 882 0.00      
9 B1 3318 3087 3.81      
10 B1 1024 953 4.12      
11 B1 899 836 1.27      
12 B2 3218 2995 7.26      
13 B2 1570 1461 1.79      
14 B2 1181 1099 42.23      
15 B2 695 646 0.92      

Unscaled Zero Point Vibrational Energy (zpe) 12554.1 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 11681.6 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 CID/3-21G*
ABC
0.72478 0.35711 0.26447

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.869
C2 0.000 0.751 -0.797
C3 0.000 -0.751 -0.797
H4 -0.913 1.255 -1.084
H5 0.913 1.255 -1.084
H6 0.913 -1.255 -1.084
H7 -0.913 -1.255 -1.084

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82811.82812.49472.49472.49472.4947
C21.82811.50281.08141.08142.22282.2228
C31.82811.50282.22282.22281.08141.0814
H42.49471.08142.22281.82633.10382.5096
H52.49471.08142.22281.82632.50963.1038
H62.49472.22281.08143.10382.50961.8263
H72.49472.22281.08142.50963.10381.8263

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.731 S1 C2 H4 115.662
S1 C2 H5 115.662 S1 C3 C2 65.731
S1 C3 H6 115.662 S1 C3 H7 115.662
C2 S1 C3 48.539 C2 C3 H6 117.741
C2 C3 H7 117.741 C3 C2 H4 117.741
C3 C2 H5 117.741 H4 C2 H5 115.216
H6 C3 H7 115.216
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability