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: B2PLYP=FULLultrafine/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B2PLYP=FULLultrafine/6-311G**
 hartrees
Energy at 0K-476.626979
Energy at 298.15K 
HF Energy-476.438646
Nuclear repulsion energy100.910287
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 B2PLYP=FULLultrafine/6-311G**
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 3153 3153 14.27      
2 A1 1518 1518 4.70      
3 A1 1160 1160 3.83      
4 A1 1068 1068 0.20      
5 A1 642 642 26.27      
6 A2 3236 3236 0.00      
7 A2 1207 1207 0.00      
8 A2 925 925 0.00      
9 B1 3250 3250 6.90      
10 B1 980 980 9.77      
11 B1 852 852 0.39      
12 B2 3151 3151 12.51      
13 B2 1491 1491 0.75      
14 B2 1100 1100 44.51      
15 B2 674 674 0.84      

Unscaled Zero Point Vibrational Energy (zpe) 12203.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12203.7 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 B2PLYP=FULLultrafine/6-311G**
ABC
0.73873 0.35618 0.26586

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.870
C2 0.000 0.740 -0.801
C3 0.000 -0.740 -0.801
H4 -0.914 1.250 -1.077
H5 0.914 1.250 -1.077
H6 0.914 -1.250 -1.077
H7 -0.914 -1.250 -1.077

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82731.82732.48792.48792.48792.4879
C21.82731.48041.08271.08272.20762.2076
C31.82731.48042.20762.20761.08271.0827
H42.48791.08272.20761.82853.09752.5002
H52.48791.08272.20761.82852.50023.0975
H62.48792.20761.08273.09752.50021.8285
H72.48792.20761.08272.50023.09751.8285

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.103 S1 C2 H4 115.098
S1 C2 H5 115.098 S1 C3 C2 66.103
S1 C3 H6 115.098 S1 C3 H7 115.098
C2 S1 C3 47.794 C2 C3 H6 118.093
C2 C3 H7 118.093 C3 C2 H4 118.093
C3 C2 H5 118.093 H4 C2 H5 115.223
H6 C3 H7 115.223
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability