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: MP2=FULL/cc-pV(T+d)Z

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=FULL/cc-pV(T+d)Z
 hartrees
Energy at 0K-476.261403
Energy at 298.15K-476.265903
HF Energy-475.613040
Nuclear repulsion energy101.882457
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=FULL/cc-pV(T+d)Z
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 3194 3028 9.88      
2 A1 1514 1436 2.82      
3 A1 1167 1107 1.34      
4 A1 1061 1006 1.65      
5 A1 668 634 18.66      
6 A2 3267 3098 0.00      
7 A2 1206 1143 0.00      
8 A2 920 872 0.00      
9 B1 3281 3111 1.37      
10 B1 978 927 3.57      
11 B1 843 799 0.32      
12 B2 3191 3026 7.36      
13 B2 1491 1414 0.68      
14 B2 1084 1028 25.30      
15 B2 715 678 1.07      

Unscaled Zero Point Vibrational Energy (zpe) 12289.5 cm-1
Scaled (by 0.9481) Zero Point Vibrational Energy (zpe) 11651.7 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 MP2=FULL/cc-pV(T+d)Z
ABC
0.74471 0.36572 0.27175

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pV(T+d)Z

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.858
C2 0.000 0.738 -0.790
C3 0.000 -0.738 -0.790
H4 -0.911 1.241 -1.062
H5 0.911 1.241 -1.062
H6 0.911 -1.241 -1.062
H7 -0.911 -1.241 -1.062

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.80531.80532.46102.46102.46102.4610
C21.80531.47641.07591.07592.19592.1959
C31.80531.47642.19592.19591.07591.0759
H42.46101.07592.19591.82293.07952.4820
H52.46101.07592.19591.82292.48203.0795
H62.46102.19591.07593.07952.48201.8229
H72.46102.19591.07592.48203.07951.8229

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.863 S1 C2 H4 114.965
S1 C2 H5 114.965 S1 C3 C2 65.863
S1 C3 H6 114.965 S1 C3 H7 114.965
C2 S1 C3 48.274 C2 C3 H6 117.858
C2 C3 H7 117.858 C3 C2 H4 117.858
C3 C2 H5 117.858 H4 C2 H5 115.795
H6 C3 H7 115.795
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability