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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: B3PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/3-21G*
 hartrees
Energy at 0K-474.421646
Energy at 298.15K-474.426095
HF Energy-474.421646
Nuclear repulsion energy100.529082
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 B3PW91/3-21G*
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 3162 3034 7.94      
2 A1 1525 1463 3.35      
3 A1 1127 1081 0.02      
4 A1 1066 1022 6.53      
5 A1 624 598 21.33      
6 A2 3244 3112 0.00      
7 A2 1212 1163 0.00      
8 A2 904 867 0.00      
9 B1 3261 3129 3.01      
10 B1 979 940 5.93      
11 B1 869 833 2.38      
12 B2 3159 3031 7.78      
13 B2 1510 1448 3.69      
14 B2 1121 1076 46.20      
15 B2 677 650 0.52      

Unscaled Zero Point Vibrational Energy (zpe) 12219.5 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 11723.4 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 B3PW91/3-21G*
ABC
0.72690 0.35536 0.26407

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.871
C2 0.000 0.749 -0.800
C3 0.000 -0.749 -0.800
H4 -0.918 1.254 -1.084
H5 0.918 1.254 -1.084
H6 0.918 -1.254 -1.084
H7 -0.918 -1.254 -1.084

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.83101.83102.49732.49732.49732.4973
C21.83101.49741.08551.08552.22142.2214
C31.83101.49742.22142.22141.08551.0855
H42.49731.08552.22141.83553.10832.5085
H52.49731.08552.22141.83552.50853.1083
H62.49732.22141.08553.10832.50851.8355
H72.49732.22141.08552.50853.10831.8355

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.864 S1 C2 H4 115.403
S1 C2 H5 115.403 S1 C3 C2 65.864
S1 C3 H6 115.403 S1 C3 H7 115.403
C2 S1 C3 48.273 C2 C3 H6 117.755
C2 C3 H7 117.755 C3 C2 H4 117.755
C3 C2 H5 117.755 H4 C2 H5 115.442
H6 C3 H7 115.442
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.089      
2 C -0.564      
3 C -0.564      
4 H 0.259      
5 H 0.259      
6 H 0.259      
7 H 0.259      


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 -2.012 2.012
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.051 0.000 0.000
y 0.000 -24.243 0.000
z 0.000 0.000 -26.318
Traceless
 xyz
x -0.771 0.000 0.000
y 0.000 1.941 0.000
z 0.000 0.000 -1.170
Polar
3z2-r2-2.341
x2-y2-1.808
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.701 0.000 0.000
y 0.000 4.649 0.000
z 0.000 0.000 5.989


<r2> (average value of r2) Å2
<r2> 56.854
(<r2>)1/2 7.540