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/aug-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/aug-cc-pVDZ
 hartrees
Energy at 0K-476.799745
Energy at 298.15K-476.804207
HF Energy-476.799745
Nuclear repulsion energy100.901463
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/aug-cc-pVDZ
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 3155 3023 15.80      
2 A1 1489 1427 2.09      
3 A1 1165 1116 1.60      
4 A1 1039 995 0.71      
5 A1 660 632 25.76      
6 A2 3246 3110 0.00      
7 A2 1188 1138 0.00      
8 A2 897 859 0.00      
9 B1 3260 3124 2.90      
10 B1 956 916 3.14      
11 B1 831 796 0.67      
12 B2 3153 3021 11.06      
13 B2 1457 1396 1.16      
14 B2 1059 1014 22.72      
15 B2 692 663 0.37      

Unscaled Zero Point Vibrational Energy (zpe) 12121.6 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 11616.1 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/aug-cc-pVDZ
ABC
0.73593 0.35718 0.26639

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.868
C2 0.000 0.740 -0.800
C3 0.000 -0.740 -0.800
H4 -0.920 1.256 -1.073
H5 0.920 1.256 -1.073
H6 0.920 -1.256 -1.073
H7 -0.920 -1.256 -1.073

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82471.82472.48772.48772.48772.4877
C21.82471.47991.08911.08912.21422.2142
C31.82471.47992.21422.21421.08911.0891
H42.48771.08912.21421.83953.11292.5112
H52.48771.08912.21421.83952.51123.1129
H62.48772.21421.08913.11292.51121.8395
H72.48772.21421.08912.51123.11291.8395

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.076 S1 C2 H4 114.892
S1 C2 H5 114.892 S1 C3 C2 66.076
S1 C3 H6 114.892 S1 C3 H7 114.892
C2 S1 C3 47.848 C2 C3 H6 118.259
C2 C3 H7 118.259 C3 C2 H4 118.259
C3 C2 H5 118.259 H4 C2 H5 115.230
H6 C3 H7 115.230
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.065      
2 C 0.648      
3 C 0.648      
4 H -0.340      
5 H -0.340      
6 H -0.340      
7 H -0.340      


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 -2.020 2.020
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.269 0.000 0.000
y 0.000 -24.440 0.000
z 0.000 0.000 -26.392
Traceless
 xyz
x -0.853 0.000 0.000
y 0.000 1.890 0.000
z 0.000 0.000 -1.037
Polar
3z2-r2-2.075
x2-y2-1.828
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.656 0.000 0.000
y 0.000 6.221 0.000
z 0.000 0.000 7.728


<r2> (average value of r2) Å2
<r2> 56.648
(<r2>)1/2 7.527