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: CCD/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 CCD/cc-pV(T+d)Z
 hartrees
Energy at 0K-476.155895
Energy at 298.15K-476.160397
HF Energy-475.612854
Nuclear repulsion energy101.467203
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 CCD/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 3171 3020 11.79      
2 A1 1524 1451 2.71      
3 A1 1162 1106 1.79      
4 A1 1068 1017 0.90      
5 A1 664 632 22.44      
6 A2 3253 3097 0.00      
7 A2 1215 1157 0.00      
8 A2 920 876 0.00      
9 B1 3266 3110 3.94      
10 B1 982 935 2.98      
11 B1 845 805 0.28      
12 B2 3167 3016 10.51      
13 B2 1496 1425 0.48      
14 B2 1102 1049 24.84      
15 B2 711 677 1.18      

Unscaled Zero Point Vibrational Energy (zpe) 12272.6 cm-1
Scaled (by 0.9522) Zero Point Vibrational Energy (zpe) 11686.0 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 CCD/cc-pV(T+d)Z
ABC
0.73836 0.36290 0.26942

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.861
C2 0.000 0.742 -0.792
C3 0.000 -0.742 -0.792
H4 -0.912 1.248 -1.071
H5 0.912 1.248 -1.071
H6 0.912 -1.248 -1.071
H7 -0.912 -1.248 -1.071

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.81191.81192.47442.47442.47442.4744
C21.81191.48321.08011.08012.20632.2063
C31.81191.48322.20632.20631.08011.0801
H42.47441.08012.20631.82493.09142.4953
H52.47441.08012.20631.82492.49533.0914
H62.47442.20631.08013.09142.49531.8249
H72.47442.20631.08012.49533.09141.8249

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.839 S1 C2 H4 115.309
S1 C2 H5 115.309 S1 C3 C2 65.839
S1 C3 H6 115.309 S1 C3 H7 115.309
C2 S1 C3 48.321 C2 C3 H6 117.939
C2 C3 H7 117.939 C3 C2 H4 117.939
C3 C2 H5 117.939 H4 C2 H5 115.306
H6 C3 H7 115.306
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability