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: MP4=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 MP4=FULL/cc-pV(T+d)Z
 hartrees
Energy at 0K-476.319098
Energy at 298.15K-476.323563
HF Energy-475.612874
Nuclear repulsion energy101.386339
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 MP4=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 3160 3160        
2 A1 1506 1506        
3 A1 1149 1149        
4 A1 1054 1054        
5 A1 647 647        
6 A2 3225 3225        
7 A2 1200 1200        
8 A2 904 904        
9 B1 3240 3240        
10 B1 965 965        
11 B1 835 835        
12 B2 3157 3157        
13 B2 1483 1483        
14 B2 1080 1080        
15 B2 689 689        

Unscaled Zero Point Vibrational Energy (zpe) 12147.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12147.0 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 MP4=FULL/cc-pV(T+d)Z
ABC
0.73988 0.36131 0.26874

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/cc-pV(T+d)Z

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.863
C2 0.000 0.741 -0.795
C3 0.000 -0.741 -0.795
H4 -0.912 1.245 -1.069
H5 0.912 1.245 -1.069
H6 0.912 -1.245 -1.069
H7 -0.912 -1.245 -1.069

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.81611.81612.47342.47342.47342.4734
C21.81611.48181.07811.07812.20302.2030
C31.81611.48182.20302.20301.07811.0781
H42.47341.07812.20301.82493.08782.4908
H52.47341.07812.20301.82492.49083.0878
H62.47342.20301.07813.08782.49081.8249
H72.47342.20301.07812.49083.08781.8249

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.922 S1 C2 H4 115.038
S1 C2 H5 115.038 S1 C3 C2 65.922
S1 C3 H6 115.038 S1 C3 H7 115.038
C2 S1 C3 48.155 C2 C3 H6 117.901
C2 C3 H7 117.901 C3 C2 H4 117.901
C3 C2 H5 117.901 H4 C2 H5 115.631
H6 C3 H7 115.631
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability