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: B3PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/6-31G**
 hartrees
Energy at 0K-476.712893
Energy at 298.15K-476.717357
HF Energy-476.712893
Nuclear repulsion energy101.033609
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 B3PW91/6-31G**
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 3149 3018 12.43      
2 A1 1509 1446 5.04      
3 A1 1165 1116 2.69      
4 A1 1054 1010 0.65      
5 A1 661 634 25.13      
6 A2 3233 3099 0.00      
7 A2 1194 1144 0.00      
8 A2 909 871 0.00      
9 B1 3247 3112 5.55      
10 B1 970 929 5.53      
11 B1 841 806 0.82      
12 B2 3147 3016 12.85      
13 B2 1479 1418 0.55      
14 B2 1081 1036 35.91      
15 B2 697 668 0.42      

Unscaled Zero Point Vibrational Energy (zpe) 12167.4 cm-1
Scaled (by 0.9584) Zero Point Vibrational Energy (zpe) 11661.2 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 B3PW91/6-31G**
ABC
0.73648 0.35859 0.26697

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.867
C2 0.000 0.741 -0.797
C3 0.000 -0.741 -0.797
H4 -0.915 1.255 -1.077
H5 0.915 1.255 -1.077
H6 0.915 -1.255 -1.077
H7 -0.915 -1.255 -1.077

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82091.82092.48832.48832.48832.4883
C21.82091.48121.08681.08682.21322.2132
C31.82091.48122.21322.21321.08681.0868
H42.48831.08682.21321.83083.10652.5096
H52.48831.08682.21321.83082.50963.1065
H62.48832.21321.08683.10652.50961.8308
H72.48832.21321.08682.50963.10651.8308

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.001 S1 C2 H4 115.354
S1 C2 H5 115.354 S1 C3 C2 66.001
S1 C3 H6 115.354 S1 C3 H7 115.354
C2 S1 C3 47.997 C2 C3 H6 118.240
C2 C3 H7 118.240 C3 C2 H4 118.240
C3 C2 H5 118.240 H4 C2 H5 114.774
H6 C3 H7 114.774
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.002      
2 C -0.355      
3 C -0.355      
4 H 0.177      
5 H 0.177      
6 H 0.177      
7 H 0.177      


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 -2.123 2.123
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.854 0.000 0.000
y 0.000 -23.969 0.000
z 0.000 0.000 -25.993
Traceless
 xyz
x -0.873 0.000 0.000
y 0.000 1.955 0.000
z 0.000 0.000 -1.081
Polar
3z2-r2-2.163
x2-y2-1.886
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.096 0.000 0.000
y 0.000 4.917 0.000
z 0.000 0.000 6.296


<r2> (average value of r2) Å2
<r2> 56.297
(<r2>)1/2 7.503