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: HSEh1PBE/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 HSEh1PBE/3-21G*
 hartrees
Energy at 0K-474.268990
Energy at 298.15K-474.273461
HF Energy-474.268990
Nuclear repulsion energy100.799334
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 HSEh1PBE/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 3177 3049 7.39      
2 A1 1529 1468 3.13      
3 A1 1136 1090 0.00      
4 A1 1073 1030 6.77      
5 A1 635 610 21.30      
6 A2 3259 3128 0.00      
7 A2 1217 1168 0.00      
8 A2 908 872 0.00      
9 B1 3276 3145 2.21      
10 B1 986 946 5.90      
11 B1 872 837 2.40      
12 B2 3174 3046 6.81      
13 B2 1514 1453 4.14      
14 B2 1129 1084 46.83      
15 B2 693 665 0.65      

Unscaled Zero Point Vibrational Energy (zpe) 12289.2 cm-1
Scaled (by 0.9599) Zero Point Vibrational Energy (zpe) 11796.4 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 HSEh1PBE/3-21G*
ABC
0.72889 0.35798 0.26574

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.868
C2 0.000 0.748 -0.796
C3 0.000 -0.748 -0.796
H4 -0.917 1.252 -1.081
H5 0.917 1.252 -1.081
H6 0.917 -1.252 -1.081
H7 -0.917 -1.252 -1.081

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82421.82422.49172.49172.49172.4917
C21.82421.49531.08491.08492.21862.2186
C31.82421.49532.21862.21861.08491.0849
H42.49171.08492.21861.83433.10442.5045
H52.49171.08492.21861.83432.50453.1044
H62.49172.21861.08493.10442.50451.8343
H72.49172.21861.08492.50453.10441.8343

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.805 S1 C2 H4 115.489
S1 C2 H5 115.489 S1 C3 C2 65.805
S1 C3 H6 115.489 S1 C3 H7 115.489
C2 S1 C3 48.389 C2 C3 H6 117.718
C2 C3 H7 117.718 C3 C2 H4 117.718
C3 C2 H5 117.718 H4 C2 H5 115.416
H6 C3 H7 115.416
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.095      
2 C -0.571      
3 C -0.571      
4 H 0.262      
5 H 0.262      
6 H 0.262      
7 H 0.262      


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 -1.998 1.998
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.093 0.000 0.000
y 0.000 -24.293 0.000
z 0.000 0.000 -26.375
Traceless
 xyz
x -0.759 0.000 0.000
y 0.000 1.941 0.000
z 0.000 0.000 -1.182
Polar
3z2-r2-2.365
x2-y2-1.800
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.689 0.000 0.000
y 0.000 4.632 0.000
z 0.000 0.000 5.949


<r2> (average value of r2) Å2
<r2> 56.659
(<r2>)1/2 7.527