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-476.485940
Energy at 298.15K-476.490334
HF Energy-476.485940
Nuclear repulsion energy100.274916
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 3073 3029 13.95      
2 A1 1476 1454 6.14      
3 A1 1139 1123 2.63      
4 A1 1022 1008 0.53      
5 A1 642 633 21.86      
6 A2 3150 3105 0.00      
7 A2 1163 1146 0.00      
8 A2 886 874 0.00      
9 B1 3165 3119 7.68      
10 B1 945 931 6.68      
11 B1 819 807 0.64      
12 B2 3073 3029 14.35      
13 B2 1451 1430 0.26      
14 B2 1041 1026 36.35      
15 B2 668 659 0.19      

Unscaled Zero Point Vibrational Energy (zpe) 11856.2 cm-1
Scaled (by 0.9857) Zero Point Vibrational Energy (zpe) 11686.6 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
0.72697 0.35281 0.26293

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 1.265 -1.087
H5 0.922 1.265 -1.087
H6 0.922 -1.265 -1.087
H7 -0.922 -1.265 -1.087

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.83501.83502.50862.50862.50862.5086
C21.83501.48961.09591.09592.22912.2291
C31.83501.48962.22912.22911.09591.0959
H42.50861.09592.22911.84423.13042.5294
H52.50861.09592.22911.84422.52943.1304
H62.50862.22911.09593.13042.52941.8442
H72.50862.22911.09592.52943.13041.8442

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.054 S1 C2 H4 115.399
S1 C2 H5 115.399 S1 C3 C2 66.054
S1 C3 H6 115.399 S1 C3 H7 115.399
C2 S1 C3 47.892 C2 C3 H6 118.322
C2 C3 H7 118.322 C3 C2 H4 118.322
C3 C2 H5 118.322 H4 C2 H5 114.587
H6 C3 H7 114.587
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 0.004      
2 C -0.408      
3 C -0.408      
4 H 0.203      
5 H 0.203      
6 H 0.203      
7 H 0.203      


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 -2.091 2.091
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.957 0.000 0.000
y 0.000 -24.097 0.000
z 0.000 0.000 -26.034
Traceless
 xyz
x -0.891 0.000 0.000
y 0.000 1.899 0.000
z 0.000 0.000 -1.007
Polar
3z2-r2-2.014
x2-y2-1.860
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.134 0.000 0.000
y 0.000 4.957 0.000
z 0.000 0.000 6.341


<r2> (average value of r2) Å2
<r2> 56.980
(<r2>)1/2 7.548