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: MP2/aug-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 MP2/aug-cc-pVTZ
 hartrees
Energy at 0K-476.136742
Energy at 298.15K-476.141211
HF Energy-475.611985
Nuclear repulsion energy101.215822
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 MP2/aug-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 3169 3020 10.09      
2 A1 1504 1433 2.31      
3 A1 1153 1099 1.44      
4 A1 1049 1000 1.34      
5 A1 655 624 19.78      
6 A2 3260 3107 0.00      
7 A2 1198 1141 0.00      
8 A2 909 866 0.00      
9 B1 3273 3119 0.49      
10 B1 963 918 3.01      
11 B1 835 796 0.54      
12 B2 3167 3018 5.27      
13 B2 1479 1410 0.81      
14 B2 1068 1017 20.29      
15 B2 693 660 1.06      

Unscaled Zero Point Vibrational Energy (zpe) 12188.1 cm-1
Scaled (by 0.9529) Zero Point Vibrational Energy (zpe) 11614.0 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 MP2/aug-cc-pVTZ
ABC
0.73935 0.35947 0.26787

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.864
C2 0.000 0.740 -0.796
C3 0.000 -0.740 -0.796
H4 -0.914 1.250 -1.067
H5 0.914 1.250 -1.067
H6 0.914 -1.250 -1.067
H7 -0.914 -1.250 -1.067

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.81661.81662.47472.47472.47472.4747
C21.81661.47941.08111.08112.20592.2059
C31.81661.47942.20592.20591.08111.0811
H42.47471.08112.20591.82763.09622.4993
H52.47471.08112.20591.82762.49933.0962
H62.47472.20591.08113.09622.49931.8276
H72.47472.20591.08112.49933.09621.8276

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.973 S1 C2 H4 114.927
S1 C2 H5 114.927 S1 C3 C2 65.973
S1 C3 H6 114.927 S1 C3 H7 114.927
C2 S1 C3 48.055 C2 C3 H6 118.146
C2 C3 H7 118.146 C3 C2 H4 118.146
C3 C2 H5 118.146 H4 C2 H5 115.392
H6 C3 H7 115.392
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability