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(2df,p)

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(2df,p)
 hartrees
Energy at 0K-476.498486
Energy at 298.15K-476.502872
HF Energy-476.498486
Nuclear repulsion energy100.586802
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(2df,p)
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 3063 3031 12.95      
2 A1 1438 1423 5.40      
3 A1 1127 1115 1.58      
4 A1 1007 996 0.11      
5 A1 641 634 20.64      
6 A2 3145 3113 0.00      
7 A2 1150 1138 0.00      
8 A2 866 857 0.00      
9 B1 3161 3128 4.02      
10 B1 923 914 4.57      
11 B1 805 797 0.43      
12 B2 3063 3032 12.45      
13 B2 1418 1403 0.21      
14 B2 1025 1014 25.00      
15 B2 674 667 0.07      

Unscaled Zero Point Vibrational Energy (zpe) 11751.9 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 11630.8 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(2df,p)
ABC
0.72742 0.35627 0.26488

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.869
C2 0.000 0.745 -0.800
C3 0.000 -0.745 -0.800
H4 -0.922 1.263 -1.078
H5 0.922 1.263 -1.078
H6 0.922 -1.263 -1.078
H7 -0.922 -1.263 -1.078

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82761.82762.49782.49782.49782.4978
C21.82761.48971.09361.09362.22712.2271
C31.82761.48972.22712.22711.09361.0936
H42.49781.09362.22711.84333.12762.5266
H52.49781.09362.22711.84332.52663.1276
H62.49782.22711.09363.12762.52661.8433
H72.49782.22711.09362.52663.12761.8433

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.948 S1 C2 H4 115.214
S1 C2 H5 115.214 S1 C3 C2 65.948
S1 C3 H6 115.214 S1 C3 H7 115.214
C2 S1 C3 48.104 C2 C3 H6 118.299
C2 C3 H7 118.299 C3 C2 H4 118.299
C3 C2 H5 118.299 H4 C2 H5 114.869
H6 C3 H7 114.869
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.171      
2 C -0.223      
3 C -0.223      
4 H 0.154      
5 H 0.154      
6 H 0.154      
7 H 0.154      


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 -2.007 2.007
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.840 0.000 0.000
y 0.000 -24.147 0.000
z 0.000 0.000 -25.865
Traceless
 xyz
x -0.835 0.000 0.000
y 0.000 1.705 0.000
z 0.000 0.000 -0.871
Polar
3z2-r2-1.742
x2-y2-1.693
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.644 0.000 0.000
y 0.000 5.323 0.000
z 0.000 0.000 6.595


<r2> (average value of r2) Å2
<r2> 56.647
(<r2>)1/2 7.526