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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: MP2/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/STO-3G
 hartrees
Energy at 0K-470.415429
Energy at 298.15K-470.419957
HF Energy-470.273785
Nuclear repulsion energy100.473231
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 MP2/STO-3G
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 3420 2982 0.02      
2 A1 1681 1466 3.79      
3 A1 1268 1106 1.74      
4 A1 1159 1010 0.09      
5 A1 820 715 3.81      
6 A2 3559 3103 0.00      
7 A2 1307 1140 0.00      
8 A2 996 868 0.00      
9 B1 3565 3108 3.43      
10 B1 1074 936 0.17      
11 B1 910 794 0.01      
12 B2 3412 2975 0.31      
13 B2 1662 1449 1.31      
14 B2 1223 1067 11.37      
15 B2 865 754 0.62      

Unscaled Zero Point Vibrational Energy (zpe) 13460.6 cm-1
Scaled (by 0.8719) Zero Point Vibrational Energy (zpe) 11736.3 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 MP2/STO-3G
ABC
0.70277 0.36344 0.26526

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.862
C2 0.000 0.765 -0.779
C3 0.000 -0.765 -0.779
H4 -0.920 1.274 -1.109
H5 0.920 1.274 -1.109
H6 0.920 -1.274 -1.109
H7 -0.920 -1.274 -1.109

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.81071.81072.52092.52092.52092.5209
C21.81071.52931.10191.10192.26082.2608
C31.81071.52932.26082.26081.10191.1019
H42.52091.10192.26081.83943.14282.5483
H52.52091.10192.26081.83942.54833.1428
H62.52092.26081.10193.14282.54831.8394
H72.52092.26081.10192.54833.14281.8394

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.020 S1 C2 H4 117.813
S1 C2 H5 117.813 S1 C3 C2 65.020
S1 C3 H6 117.813 S1 C3 H7 117.813
C2 S1 C3 49.959 C2 C3 H6 117.539
C2 C3 H7 117.539 C3 C2 H4 117.539
C3 C2 H5 117.539 H4 C2 H5 113.157
H6 C3 H7 113.157
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability