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: B3LYP/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3LYP/CEP-121G
 hartrees
Energy at 0K-23.784915
Energy at 298.15K-23.789262
HF Energy-23.784915
Nuclear repulsion energy36.617739
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 B3LYP/CEP-121G
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 3116 3037 10.74      
2 A1 1500 1462 1.88      
3 A1 1134 1105 3.92      
4 A1 1057 1030 3.45      
5 A1 574 559 23.14      
6 A2 3213 3131 0.00      
7 A2 1202 1172 0.00      
8 A2 886 864 0.00      
9 B1 3232 3150 16.91      
10 B1 910 887 4.65      
11 B1 843 822 0.92      
12 B2 3108 3029 14.74      
13 B2 1476 1439 4.35      
14 B2 1071 1044 57.78      
15 B2 572 558 0.72      

Unscaled Zero Point Vibrational Energy (zpe) 11948.2 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 11643.5 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 B3LYP/CEP-121G
ABC
0.72260 0.31593 0.24122

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.248
C2 0.000 0.748 -0.541
C3 0.000 -0.748 -0.541
H4 -0.918 1.271 -0.791
H5 0.918 1.271 -0.791
H6 0.918 -1.271 -0.791
H7 -0.918 -1.271 -0.791

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.93891.93892.57252.57252.57252.5725
C21.93891.49541.08631.08632.23182.2318
C31.93891.49542.23182.23181.08631.0863
H42.57251.08632.23181.83693.13612.5417
H52.57251.08632.23181.83692.54173.1361
H62.57252.23181.08633.13612.54171.8369
H72.57252.23181.08632.54173.13611.8369

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 67.316 S1 C2 H4 113.481
S1 C2 H5 113.481 S1 C3 C2 67.316
S1 C3 H6 113.481 S1 C3 H7 113.481
C2 S1 C3 45.367 C2 C3 H6 118.791
C2 C3 H7 118.791 C3 C2 H4 118.791
C3 C2 H5 118.791 H4 C2 H5 115.454
H6 C3 H7 115.454
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.058      
2 C -0.419      
3 C -0.419      
4 H 0.195      
5 H 0.195      
6 H 0.195      
7 H 0.195      


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 -2.532 2.532
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.733 0.000 0.000
y 0.000 -23.847 0.000
z 0.000 0.000 -27.589
Traceless
 xyz
x -0.014 0.000 0.000
y 0.000 2.814 0.000
z 0.000 0.000 -2.799
Polar
3z2-r2-5.599
x2-y2-1.885
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.187 0.000 0.000
y 0.000 5.390 0.000
z 0.000 0.000 7.417


<r2> (average value of r2) Å2
<r2> 44.564
(<r2>)1/2 6.676