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-31G*

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-31G*
 hartrees
Energy at 0K-23.823797
Energy at 298.15K-23.828172
HF Energy-23.823797
Nuclear repulsion energy37.192969
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-31G*
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 3136 3029 20.09      
2 A1 1496 1445 3.22      
3 A1 1134 1095 4.08      
4 A1 1036 1000 1.32      
5 A1 629 608 27.91      
6 A2 3218 3108 0.00      
7 A2 1176 1136 0.00      
8 A2 872 842 0.00      
9 B1 3236 3125 23.05      
10 B1 941 908 8.65      
11 B1 817 789 2.13      
12 B2 3133 3026 24.75      
13 B2 1458 1408 0.47      
14 B2 1047 1011 49.95      
15 B2 647 624 0.48      

Unscaled Zero Point Vibrational Energy (zpe) 11988.0 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 11576.8 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-31G*
ABC
0.71758 0.34551 0.25778

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.193
C2 0.000 0.751 -0.505
C3 0.000 -0.751 -0.505
H4 -0.924 1.270 -0.779
H5 0.924 1.270 -0.779
H6 0.924 -1.270 -0.779
H7 -0.924 -1.270 -0.779

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.85691.85692.52082.52082.52082.5208
C21.85691.50231.09481.09482.23962.2396
C31.85691.50232.23962.23961.09481.0948
H42.52081.09482.23961.84873.14222.5408
H52.52081.09482.23961.84872.54083.1422
H62.52082.23961.09483.14222.54081.8487
H72.52082.23961.09482.54083.14221.8487

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.139 S1 C2 H4 114.836
S1 C2 H5 114.836 S1 C3 C2 66.139
S1 C3 H6 114.836 S1 C3 H7 114.836
C2 S1 C3 47.723 C2 C3 H6 118.311
C2 C3 H7 118.311 C3 C2 H4 118.311
C3 C2 H5 118.311 H4 C2 H5 115.193
H6 C3 H7 115.193
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.207      
2 C -0.319      
3 C -0.319      
4 H 0.211      
5 H 0.211      
6 H 0.211      
7 H 0.211      


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 -2.254 2.254
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.179 0.000 0.000
y 0.000 -23.406 0.000
z 0.000 0.000 -26.694
Traceless
 xyz
x -0.129 0.000 0.000
y 0.000 2.531 0.000
z 0.000 0.000 -2.402
Polar
3z2-r2-4.804
x2-y2-1.773
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.493 0.000 0.000
y 0.000 5.282 0.000
z 0.000 0.000 6.871


<r2> (average value of r2) Å2
<r2> 43.064
(<r2>)1/2 6.562