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: HF/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/TZVP
 hartrees
Energy at 0K-475.593725
Energy at 298.15K-475.598303
HF Energy-475.593725
Nuclear repulsion energy101.371866
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 HF/TZVP
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 3289 2988 15.53      
2 A1 1629 1480 3.85      
3 A1 1219 1108 5.21      
4 A1 1142 1038 0.03      
5 A1 663 602 50.89      
6 A2 3369 3061 0.00      
7 A2 1304 1185 0.00      
8 A2 975 886 0.00      
9 B1 3384 3075 7.64      
10 B1 1042 947 3.46      
11 B1 900 818 0.37      
12 B2 3283 2983 14.27      
13 B2 1594 1448 0.58      
14 B2 1196 1087 45.03      
15 B2 727 660 0.64      

Unscaled Zero Point Vibrational Energy (zpe) 12856.8 cm-1
Scaled (by 0.9086) Zero Point Vibrational Energy (zpe) 11681.7 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 HF/TZVP
ABC
0.74848 0.35836 0.26781

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.867
C2 0.000 0.735 -0.800
C3 0.000 -0.735 -0.800
H4 -0.906 1.244 -1.070
H5 0.906 1.244 -1.070
H6 0.906 -1.244 -1.070
H7 -0.906 -1.244 -1.070

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82231.82232.47432.47432.47432.4743
C21.82231.47061.07351.07352.19342.1934
C31.82231.47062.19342.19341.07351.0735
H42.47431.07352.19341.81183.07782.4880
H52.47431.07352.19341.81182.48803.0778
H62.47432.19341.07353.07782.48801.8118
H72.47432.19341.07352.48803.07781.8118

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.203 S1 C2 H4 114.929
S1 C2 H5 114.929 S1 C3 C2 66.203
S1 C3 H6 114.929 S1 C3 H7 114.929
C2 S1 C3 47.595 C2 C3 H6 118.286
C2 C3 H7 118.286 C3 C2 H4 118.286
C3 C2 H5 118.286 H4 C2 H5 115.099
H6 C3 H7 115.099
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.149      
2 C -0.184      
3 C -0.184      
4 H 0.129      
5 H 0.129      
6 H 0.129      
7 H 0.129      


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 -2.370 2.370
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.420 0.000 0.000
y 0.000 -24.447 0.000
z 0.000 0.000 -26.588
Traceless
 xyz
x -0.902 0.000 0.000
y 0.000 2.057 0.000
z 0.000 0.000 -1.155
Polar
3z2-r2-2.310
x2-y2-1.973
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.203 0.000 0.000
y 0.000 5.460 0.000
z 0.000 0.000 6.810


<r2> (average value of r2) Å2
<r2> 56.384
(<r2>)1/2 7.509