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: LSDA/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at LSDA/6-31G(2df,p)
 hartrees
Energy at 0K-475.297601
Energy at 298.15K-475.302008
HF Energy-475.297601
Nuclear repulsion energy101.603898
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 LSDA/6-31G(2df,p)
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 3065 3015 8.94      
2 A1 1418 1395 3.44      
3 A1 1152 1134 1.25      
4 A1 993 977 0.84      
5 A1 671 660 17.55      
6 A2 3150 3099 0.00      
7 A2 1138 1120 0.00      
8 A2 856 842 0.00      
9 B1 3163 3113 0.52      
10 B1 918 903 5.05      
11 B1 801 788 0.76      
12 B2 3065 3016 6.74      
13 B2 1392 1370 1.79      
14 B2 1017 1000 27.09      
15 B2 705 693 0.27      

Unscaled Zero Point Vibrational Energy (zpe) 11751.2 cm-1
Scaled (by 0.984) Zero Point Vibrational Energy (zpe) 11563.2 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 LSDA/6-31G(2df,p)
ABC
0.73789 0.36533 0.27131

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.858
C2 0.000 0.738 -0.787
C3 0.000 -0.738 -0.787
H4 -0.922 1.255 -1.070
H5 0.922 1.255 -1.070
H6 0.922 -1.255 -1.070
H7 -0.922 -1.255 -1.070

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.80281.80282.47872.47872.47872.4787
C21.80281.47581.09461.09462.21422.2142
C31.80281.47582.21422.21421.09461.0946
H42.47871.09462.21421.84433.11492.5102
H52.47871.09462.21421.84432.51023.1149
H62.47872.21421.09463.11492.51021.8443
H72.47872.21421.09462.51023.11491.8443

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.839 S1 C2 H4 115.441
S1 C2 H5 115.441 S1 C3 C2 65.839
S1 C3 H6 115.441 S1 C3 H7 115.441
C2 S1 C3 48.321 C2 C3 H6 118.199
C2 C3 H7 118.199 C3 C2 H4 118.199
C3 C2 H5 118.199 H4 C2 H5 114.797
H6 C3 H7 114.797
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.187      
2 C -0.258      
3 C -0.258      
4 H 0.176      
5 H 0.176      
6 H 0.176      
7 H 0.176      


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 -1.972 1.972
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.730 0.000 0.000
y 0.000 -24.134 0.000
z 0.000 0.000 -25.916
Traceless
 xyz
x -0.705 0.000 0.000
y 0.000 1.689 0.000
z 0.000 0.000 -0.984
Polar
3z2-r2-1.967
x2-y2-1.596
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.643 0.000 0.000
y 0.000 5.277 0.000
z 0.000 0.000 6.488


<r2> (average value of r2) Å2
<r2> 55.803
(<r2>)1/2 7.470