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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-475.956175
Energy at 298.15K-475.960698
HF Energy-475.546345
Nuclear repulsion energy101.108419
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 MP3/6-31G*
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 3211 3014 9.24      
2 A1 1566 1470 4.47      
3 A1 1193 1120 3.15      
4 A1 1100 1032 0.88      
5 A1 682 640 22.29      
6 A2 3291 3089 0.00      
7 A2 1237 1161 0.00      
8 A2 951 893 0.00      
9 B1 3304 3101 5.50      
10 B1 1010 948 5.21      
11 B1 870 817 0.38      
12 B2 3208 3011 9.69      
13 B2 1535 1441 0.29      
14 B2 1132 1062 37.20      
15 B2 714 671 1.29      

Unscaled Zero Point Vibrational Energy (zpe) 12501.8 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 11734.2 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 MP3/6-31G*
ABC
0.73557 0.35972 0.26738

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.866
C2 0.000 0.742 -0.794
C3 0.000 -0.742 -0.794
H4 -0.914 1.252 -1.081
H5 0.914 1.252 -1.081
H6 0.914 -1.252 -1.081
H7 -0.914 -1.252 -1.081

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.81821.81822.48842.48842.48842.4884
C21.81821.48481.08511.08512.21292.2129
C31.81821.48482.21292.21291.08511.0851
H42.48841.08512.21291.82783.10092.5049
H52.48841.08512.21291.82782.50493.1009
H62.48842.21291.08513.10092.50491.8278
H72.48842.21291.08512.50493.10091.8278

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.901 S1 C2 H4 115.659
S1 C2 H5 115.659 S1 C3 C2 65.901
S1 C3 H6 115.659 S1 C3 H7 115.659
C2 S1 C3 48.198 C2 C3 H6 118.038
C2 C3 H7 118.038 C3 C2 H4 118.038
C3 C2 H5 118.038 H4 C2 H5 114.745
H6 C3 H7 114.745
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability