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/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-476.010032
Energy at 298.15K-476.014467
HF Energy-475.576642
Nuclear repulsion energy100.084371
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/aug-cc-pVDZ
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 3169 3039 11.26      
2 A1 1491 1430 2.24      
3 A1 1155 1108 2.18      
4 A1 1038 995 0.97      
5 A1 642 616 20.51      
6 A2 3266 3132 0.00      
7 A2 1190 1141 0.00      
8 A2 897 860 0.00      
9 B1 3280 3145 1.42      
10 B1 952 913 3.00      
11 B1 828 794 0.41      
12 B2 3165 3035 6.73      
13 B2 1460 1400 0.44      
14 B2 1048 1005 20.62      
15 B2 664 637 0.74      

Unscaled Zero Point Vibrational Energy (zpe) 12121.5 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 11624.6 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/aug-cc-pVDZ
ABC
0.72799 0.34987 0.26169

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.877
C2 0.000 0.745 -0.811
C3 0.000 -0.745 -0.811
H4 -0.927 1.259 -1.076
H5 0.927 1.259 -1.076
H6 0.927 -1.259 -1.076
H7 -0.927 -1.259 -1.076

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.84451.84452.50132.50132.50132.5013
C21.84451.48921.09241.09242.22332.2233
C31.84451.48922.22332.22331.09241.0924
H42.50131.09242.22331.85303.12632.5179
H52.50131.09242.22331.85302.51793.1263
H62.50132.22331.09243.12632.51791.8530
H72.50132.22331.09242.51793.12631.8530

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.191 S1 C2 H4 114.345
S1 C2 H5 114.345 S1 C3 C2 66.191
S1 C3 H6 114.345 S1 C3 H7 114.345
C2 S1 C3 47.618 C2 C3 H6 118.089
C2 C3 H7 118.089 C3 C2 H4 118.089
C3 C2 H5 118.089 H4 C2 H5 116.020
H6 C3 H7 116.020
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability