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: PBEPBE/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 PBEPBE/6-31G**
 hartrees
Energy at 0K-476.491359
Energy at 298.15K-476.495752
HF Energy-476.491359
Nuclear repulsion energy100.313362
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 PBEPBE/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 3070 3028 13.06      
2 A1 1462 1442 5.73      
3 A1 1134 1118 2.53      
4 A1 1017 1003 0.52      
5 A1 641 632 21.57      
6 A2 3152 3109 0.00      
7 A2 1155 1139 0.00      
8 A2 878 866 0.00      
9 B1 3166 3122 6.62      
10 B1 937 924 6.16      
11 B1 815 803 0.69      
12 B2 3070 3028 13.30      
13 B2 1436 1417 0.33      
14 B2 1034 1020 34.40      
15 B2 668 659 0.20      

Unscaled Zero Point Vibrational Energy (zpe) 11816.3 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 11654.4 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 PBEPBE/6-31G**
ABC
0.72746 0.35306 0.26312

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.874
C2 0.000 0.745 -0.803
C3 0.000 -0.745 -0.803
H4 -0.922 1.264 -1.085
H5 0.922 1.264 -1.085
H6 0.922 -1.264 -1.085
H7 -0.922 -1.264 -1.085

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.83471.83472.50652.50652.50652.5065
C21.83471.48941.09491.09492.22782.2278
C31.83471.48942.22782.22781.09491.0949
H42.50651.09492.22781.84393.12852.5273
H52.50651.09492.22781.84392.52733.1285
H62.50652.22781.09493.12852.52731.8439
H72.50652.22781.09492.52733.12851.8439

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.053 S1 C2 H4 115.317
S1 C2 H5 115.317 S1 C3 C2 66.053
S1 C3 H6 115.317 S1 C3 H7 115.317
C2 S1 C3 47.895 C2 C3 H6 118.295
C2 C3 H7 118.295 C3 C2 H4 118.295
C3 C2 H5 118.295 H4 C2 H5 114.716
H6 C3 H7 114.716
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.001      
2 C -0.333      
3 C -0.333      
4 H 0.166      
5 H 0.166      
6 H 0.166      
7 H 0.166      


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 -2.084 2.084
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.959 0.000 0.000
y 0.000 -24.083 0.000
z 0.000 0.000 -26.042
Traceless
 xyz
x -0.897 0.000 0.000
y 0.000 1.918 0.000
z 0.000 0.000 -1.021
Polar
3z2-r2-2.041
x2-y2-1.877
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.172 0.000 0.000
y 0.000 4.999 0.000
z 0.000 0.000 6.383


<r2> (average value of r2) Å2
<r2> 56.942
(<r2>)1/2 7.546