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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: HF/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/CEP-121G*
 hartrees
Energy at 0K-23.217650
Energy at 298.15K-23.222227
HF Energy-23.217650
Nuclear repulsion energy37.792401
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 HF/CEP-121G*
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 3304 2985 21.43      
2 A1 1636 1478 5.81      
3 A1 1221 1103 7.37      
4 A1 1141 1031 0.00      
5 A1 678 613 51.31      
6 A2 3390 3062 0.00      
7 A2 1299 1173 0.00      
8 A2 977 882 0.00      
9 B1 3405 3076 17.42      
10 B1 1047 946 3.48      
11 B1 889 803 0.36      
12 B2 3296 2978 23.51      
13 B2 1597 1442 0.00      
14 B2 1190 1075 43.67      
15 B2 734 663 0.86      

Unscaled Zero Point Vibrational Energy (zpe) 12901.0 cm-1
Scaled (by 0.9034) Zero Point Vibrational Energy (zpe) 11654.7 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 HF/CEP-121G*
ABC
0.73803 0.35796 0.26637

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.172
C2 0.000 0.741 -0.496
C3 0.000 -0.741 -0.496
H4 -0.908 1.253 -0.767
H5 0.908 1.253 -0.767
H6 0.908 -1.253 -0.767
H7 -0.908 -1.253 -0.767

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82531.82532.48052.48052.48052.4805
C21.82531.48291.07671.07672.20772.2077
C31.82531.48292.20772.20771.07671.0767
H42.48051.07672.20771.81613.09412.5051
H52.48051.07672.20771.81612.50513.0941
H62.48052.20771.07673.09412.50511.8161
H72.48052.20771.07672.50513.09411.8161

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.034 S1 C2 H4 115.013
S1 C2 H5 115.013 S1 C3 C2 66.034
S1 C3 H6 115.013 S1 C3 H7 115.013
C2 S1 C3 47.933 C2 C3 H6 118.340
C2 C3 H7 118.340 C3 C2 H4 118.340
C3 C2 H5 118.340 H4 C2 H5 114.999
H6 C3 H7 114.999
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.154      
2 C -0.330      
3 C -0.330      
4 H 0.204      
5 H 0.204      
6 H 0.204      
7 H 0.204      


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 -2.405 2.405
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.635 0.000 0.000
y 0.000 -23.570 0.000
z 0.000 0.000 -27.163
Traceless
 xyz
x -0.268 0.000 0.000
y 0.000 2.829 0.000
z 0.000 0.000 -2.561
Polar
3z2-r2-5.121
x2-y2-2.064
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.358 0.000 0.000
y 0.000 5.312 0.000
z 0.000 0.000 6.800


<r2> (average value of r2) Å2
<r2> 42.432
(<r2>)1/2 6.514