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: mPW1PW91/daug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/daug-cc-pVTZ
 hartrees
Energy at 0K-476.834612
Energy at 298.15K-476.839076
HF Energy-476.834612
Nuclear repulsion energy101.558028
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 mPW1PW91/daug-cc-pVTZ
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 3147 3147 15.45      
2 A1 1496 1496 2.30      
3 A1 1159 1159 1.16      
4 A1 1046 1046 0.96      
5 A1 659 659 24.59      
6 A2 3228 3228 0.00      
7 A2 1197 1197 0.00      
8 A2 904 904 0.00      
9 B1 3242 3242 2.36      
10 B1 963 963 3.21      
11 B1 836 836 0.70      
12 B2 3146 3146 10.40      
13 B2 1470 1470 1.35      
14 B2 1080 1080 22.26      
15 B2 704 704 0.58      

Unscaled Zero Point Vibrational Energy (zpe) 12138.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12138.4 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 mPW1PW91/daug-cc-pVTZ
ABC
0.74237 0.36282 0.26992

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/daug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.861
C2 0.000 0.738 -0.793
C3 0.000 -0.738 -0.793
H4 -0.913 1.249 -1.067
H5 0.913 1.249 -1.067
H6 0.913 -1.249 -1.067
H7 -0.913 -1.249 -1.067

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.81121.81122.47232.47232.47232.4723
C21.81121.47561.08141.08142.20332.2033
C31.81121.47562.20332.20331.08141.0814
H42.47231.08142.20331.82543.09342.4973
H52.47231.08142.20331.82542.49733.0934
H62.47232.20331.08143.09342.49731.8254
H72.47232.20331.08142.49733.09341.8254

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.962 S1 C2 H4 115.111
S1 C2 H5 115.111 S1 C3 C2 65.962
S1 C3 H6 115.111 S1 C3 H7 115.111
C2 S1 C3 48.076 C2 C3 H6 118.191
C2 C3 H7 118.191 C3 C2 H4 118.191
C3 C2 H5 118.191 H4 C2 H5 115.129
H6 C3 H7 115.129
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.403      
2 C -0.444      
3 C -0.444      
4 H 0.323      
5 H 0.323      
6 H 0.323      
7 H 0.323      


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 -1.941 1.941
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.116 0.000 0.000
y 0.000 -24.388 0.000
z 0.000 0.000 -26.318
Traceless
 xyz
x -0.763 0.000 0.000
y 0.000 1.829 0.000
z 0.000 0.000 -1.066
Polar
3z2-r2-2.133
x2-y2-1.728
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.772 0.000 0.000
y 0.000 6.270 0.000
z 0.000 0.000 7.715


<r2> (average value of r2) Å2
<r2> 56.066
(<r2>)1/2 7.488