return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: MP3=FULL/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 MP3=FULL/3-21G*
 hartrees
Energy at 0K-473.608068
Energy at 298.15K-473.612539
HF Energy-473.261849
Nuclear repulsion energy100.194609
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=FULL/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 3192 3192 6.52      
2 A1 1569 1569 3.80      
3 A1 1154 1154 0.08      
4 A1 1061 1061 3.85      
5 A1 617 617 20.59      
6 A2 3269 3269 0.00      
7 A2 1244 1244 0.00      
8 A2 931 931 0.00      
9 B1 3285 3285 4.51      
10 B1 1006 1006 4.39      
11 B1 889 889 1.13      
12 B2 3186 3186 7.00      
13 B2 1556 1556 1.46      
14 B2 1153 1153 41.23      
15 B2 669 669 0.71      

Unscaled Zero Point Vibrational Energy (zpe) 12390.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12390.0 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=FULL/3-21G*
ABC
0.72033 0.35335 0.26198

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.874
C2 0.000 0.754 -0.802
C3 0.000 -0.754 -0.802
H4 -0.916 1.258 -1.089
H5 0.916 1.258 -1.089
H6 0.916 -1.258 -1.089
H7 -0.916 -1.258 -1.089

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.83771.83772.50452.50452.50452.5045
C21.83771.50781.08411.08412.22912.2291
C31.83771.50782.22912.22911.08411.0841
H42.50451.08412.22911.83203.11232.5159
H52.50451.08412.22911.83202.51593.1123
H62.50452.22911.08413.11232.51591.8320
H72.50452.22911.08412.51593.11231.8320

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.781 S1 C2 H4 115.577
S1 C2 H5 115.577 S1 C3 C2 65.781
S1 C3 H6 115.577 S1 C3 H7 115.577
C2 S1 C3 48.439 C2 C3 H6 117.709
C2 C3 H7 117.709 C3 C2 H4 117.709
C3 C2 H5 117.709 H4 C2 H5 115.337
H6 C3 H7 115.337
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability