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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: B3LYP/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 B3LYP/3-21G
 hartrees
Energy at 0K-474.389400
Energy at 298.15K-474.393701
HF Energy-474.389400
Nuclear repulsion energy97.096500
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/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3180 3068 3.14      
2 A1 1526 1472 2.85      
3 A1 1114 1075 0.93      
4 A1 1061 1024 4.41      
5 A1 551 532 23.94      
6 A2 3266 3152 0.00      
7 A2 1225 1182 0.00      
8 A2 838 808 0.00      
9 B1 3286 3171 1.70      
10 B1 907 875 2.07      
11 B1 857 827 3.94      
12 B2 3178 3066 4.08      
13 B2 1506 1454 6.29      
14 B2 1084 1046 43.23      
15 B2 557 537 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 12067.9 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 11644.4 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 B3LYP/3-21G
ABC
0.73457 0.31326 0.24103

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.930
C2 0.000 0.741 -0.869
C3 0.000 -0.741 -0.869
H4 -0.920 1.257 -1.111
H5 0.920 1.257 -1.111
H6 0.920 -1.257 -1.111
H7 -0.920 -1.257 -1.111

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.94491.94492.56762.56762.56762.5676
C21.94491.48131.08261.08262.21292.2129
C31.94491.48132.21292.21291.08261.0826
H42.56761.08262.21291.84003.11582.5145
H52.56761.08262.21291.84002.51453.1158
H62.56762.21291.08263.11582.51451.8400
H72.56762.21291.08262.51453.11581.8400

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 67.617 S1 C2 H4 112.883
S1 C2 H5 112.883 S1 C3 C2 67.617
S1 C3 H6 112.883 S1 C3 H7 112.883
C2 S1 C3 44.767 C2 C3 H6 118.502
C2 C3 H7 118.502 C3 C2 H4 118.502
C3 C2 H5 118.502 H4 C2 H5 116.374
H6 C3 H7 116.374
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.110      
2 C -0.553      
3 C -0.553      
4 H 0.249      
5 H 0.249      
6 H 0.249      
7 H 0.249      


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 -2.428 2.428
CHELPG        
AIM        
ESP 0.021 0.000 -2.489 2.489


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.306 0.000 0.000
y 0.000 -24.535 0.000
z 0.000 0.000 -26.805
Traceless
 xyz
x -0.636 0.000 0.000
y 0.000 2.021 0.000
z 0.000 0.000 -1.385
Polar
3z2-r2-2.769
x2-y2-1.771
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.363 0.000 0.000
y 0.000 4.536 0.000
z 0.000 0.000 6.585


<r2> (average value of r2) Å2
<r2> 60.280
(<r2>)1/2 7.764