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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: B3LYP/CEP-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 B3LYP/CEP-31G
 hartrees
Energy at 0K-23.779091
Energy at 298.15K-23.783409
HF Energy-23.779091
Nuclear repulsion energy36.485678
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 B3LYP/CEP-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 3161 3061 14.78      
2 A1 1499 1451 0.74      
3 A1 1140 1104 3.20      
4 A1 1060 1027 5.78      
5 A1 575 557 23.46      
6 A2 3253 3150 0.00      
7 A2 1198 1160 0.00      
8 A2 880 852 0.00      
9 B1 3273 3170 24.95      
10 B1 913 884 11.39      
11 B1 838 811 3.12      
12 B2 3153 3054 18.36      
13 B2 1470 1423 5.32      
14 B2 1077 1043 67.51      
15 B2 568 550 0.27      

Unscaled Zero Point Vibrational Energy (zpe) 12028.6 cm-1
Scaled (by 0.9684) Zero Point Vibrational Energy (zpe) 11648.5 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 B3LYP/CEP-31G
ABC
0.71563 0.31495 0.24010

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.250
C2 0.000 0.751 -0.541
C3 0.000 -0.751 -0.541
H4 -0.923 1.278 -0.793
H5 0.923 1.278 -0.793
H6 0.923 -1.278 -0.793
H7 -0.923 -1.278 -0.793

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.94221.94222.58032.58032.58032.5803
C21.94221.50201.09231.09232.24332.2433
C31.94221.50202.24332.24331.09231.0923
H42.58031.09232.24331.84623.15312.5561
H52.58031.09232.24331.84622.55613.1531
H62.58032.24331.09233.15312.55611.8462
H72.58032.24331.09232.55613.15311.8462

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 67.252 S1 C2 H4 113.515
S1 C2 H5 113.515 S1 C3 C2 67.252
S1 C3 H6 113.515 S1 C3 H7 113.515
C2 S1 C3 45.497 C2 C3 H6 118.849
C2 C3 H7 118.849 C3 C2 H4 118.849
C3 C2 H5 118.849 H4 C2 H5 115.359
H6 C3 H7 115.359
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.070      
2 C -0.406      
3 C -0.406      
4 H 0.221      
5 H 0.221      
6 H 0.221      
7 H 0.221      


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 -2.640 2.640
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.465 0.000 0.000
y 0.000 -23.664 0.000
z 0.000 0.000 -27.620
Traceless
 xyz
x 0.177 0.000 0.000
y 0.000 2.879 0.000
z 0.000 0.000 -3.055
Polar
3z2-r2-6.111
x2-y2-1.801
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.031 0.000 0.000
y 0.000 5.165 0.000
z 0.000 0.000 7.307


<r2> (average value of r2) Å2
<r2> 44.663
(<r2>)1/2 6.683