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: TPSSh/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 TPSSh/6-31G**
 hartrees
Energy at 0K-476.800454
Energy at 298.15K-476.804907
HF Energy-476.800454
Nuclear repulsion energy100.794561
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 TPSSh/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 3143 3013 14.72      
2 A1 1520 1458 6.77      
3 A1 1157 1109 3.01      
4 A1 1056 1012 0.25      
5 A1 651 624 25.79      
6 A2 3225 3092 0.00      
7 A2 1201 1151 0.00      
8 A2 908 871 0.00      
9 B1 3240 3106 8.94      
10 B1 968 928 5.00      
11 B1 834 800 0.58      
12 B2 3141 3011 16.28      
13 B2 1494 1432 0.04      
14 B2 1079 1035 34.72      
15 B2 688 660 0.18      

Unscaled Zero Point Vibrational Energy (zpe) 12152.4 cm-1
Scaled (by 0.9587) Zero Point Vibrational Energy (zpe) 11650.5 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 TPSSh/6-31G**
ABC
0.73394 0.35643 0.26547

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.869
C2 0.000 0.742 -0.800
C3 0.000 -0.742 -0.800
H4 -0.916 1.257 -1.077
H5 0.916 1.257 -1.077
H6 0.916 -1.257 -1.077
H7 -0.916 -1.257 -1.077

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82731.82732.49092.49092.49092.4909
C21.82731.48451.08611.08612.21592.2159
C31.82731.48452.21592.21591.08611.0861
H42.49091.08612.21591.83173.10982.5131
H52.49091.08612.21591.83172.51313.1098
H62.49092.21591.08613.10982.51311.8317
H72.49092.21591.08612.51313.10981.8317

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.034 S1 C2 H4 115.132
S1 C2 H5 115.132 S1 C3 C2 66.034
S1 C3 H6 115.132 S1 C3 H7 115.132
C2 S1 C3 47.931 C2 C3 H6 118.263
C2 C3 H7 118.263 C3 C2 H4 118.263
C3 C2 H5 118.263 H4 C2 H5 114.976
H6 C3 H7 114.976
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.010      
2 C -0.340      
3 C -0.340      
4 H 0.172      
5 H 0.172      
6 H 0.172      
7 H 0.172      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -2.174 2.174
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.106 0.000 0.000
y 0.000 4.940 0.000
z 0.000 0.000 6.327


<r2> (average value of r2) Å2
<r2> 56.512
(<r2>)1/2 7.517