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/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-476.790516
Energy at 298.15K-476.794978
HF Energy-476.790516
Nuclear repulsion energy100.982208
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/cc-pVDZ
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 3149 3017 11.15      
2 A1 1479 1417 2.73      
3 A1 1167 1119 2.33      
4 A1 1039 996 0.49      
5 A1 669 641 24.92      
6 A2 3239 3104 0.00      
7 A2 1183 1134 0.00      
8 A2 889 852 0.00      
9 B1 3252 3117 3.93      
10 B1 952 913 4.85      
11 B1 832 797 0.65      
12 B2 3146 3015 11.51      
13 B2 1444 1384 0.92      
14 B2 1059 1015 26.48      
15 B2 701 671 0.32      

Unscaled Zero Point Vibrational Energy (zpe) 12099.8 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 11595.3 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/cc-pVDZ
ABC
0.73523 0.35854 0.26711

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.866
C2 0.000 0.740 -0.797
C3 0.000 -0.740 -0.797
H4 -0.921 1.258 -1.075
H5 0.921 1.258 -1.075
H6 0.921 -1.258 -1.075
H7 -0.921 -1.258 -1.075

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82041.82042.48982.48982.48982.4898
C21.82041.47961.09231.09232.21692.2169
C31.82041.47962.21692.21691.09231.0923
H42.48981.09232.21691.84133.11712.5151
H52.48981.09232.21691.84132.51513.1171
H62.48982.21691.09233.11712.51511.8413
H72.48982.21691.09232.51513.11711.8413

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.020 S1 C2 H4 115.184
S1 C2 H5 115.184 S1 C3 C2 66.020
S1 C3 H6 115.184 S1 C3 H7 115.184
C2 S1 C3 47.960 C2 C3 H6 118.294
C2 C3 H7 118.294 C3 C2 H4 118.294
C3 C2 H5 118.294 H4 C2 H5 114.880
H6 C3 H7 114.880
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.115      
2 C -0.112      
3 C -0.112      
4 H 0.085      
5 H 0.085      
6 H 0.085      
7 H 0.085      


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 -1.926 1.926
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.790 0.000 0.000
y 0.000 -24.224 0.000
z 0.000 0.000 -25.950
Traceless
 xyz
x -0.703 0.000 0.000
y 0.000 1.647 0.000
z 0.000 0.000 -0.943
Polar
3z2-r2-1.887
x2-y2-1.566
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.945 0.000 0.000
y 0.000 5.045 0.000
z 0.000 0.000 6.405


<r2> (average value of r2) Å2
<r2> 56.354
(<r2>)1/2 7.507