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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: MP2/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-473.397844
Energy at 298.15K-473.402171
HF Energy-473.155856
Nuclear repulsion energy96.604169
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 MP2/3-21G
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 3214 3067 2.50      
2 A1 1560 1489 3.01      
3 A1 1119 1068 0.10      
4 A1 1076 1027 5.40      
5 A1 558 533 17.23      
6 A2 3303 3153 0.00      
7 A2 1254 1196 0.00      
8 A2 844 806 0.00      
9 B1 3321 3170 1.53      
10 B1 915 874 1.28      
11 B1 873 833 4.20      
12 B2 3208 3062 2.72      
13 B2 1542 1472 4.57      
14 B2 1101 1051 39.82      
15 B2 562 537 0.70      

Unscaled Zero Point Vibrational Energy (zpe) 12225.5 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 11669.3 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 MP2/3-21G
ABC
0.73040 0.30898 0.23806

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.937
C2 0.000 0.744 -0.874
C3 0.000 -0.744 -0.874
H4 -0.920 1.258 -1.123
H5 0.920 1.258 -1.123
H6 0.920 -1.258 -1.123
H7 -0.920 -1.258 -1.123

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.95781.95782.58252.58252.58252.5825
C21.95781.48831.08261.08262.21722.2172
C31.95781.48832.21722.21721.08261.0826
H42.58251.08262.21721.84023.11672.5154
H52.58251.08262.21721.84022.51543.1167
H62.58252.21721.08263.11672.51541.8402
H72.58252.21721.08262.51543.11671.8402

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 67.661 S1 C2 H4 113.118
S1 C2 H5 113.118 S1 C3 C2 67.661
S1 C3 H6 113.118 S1 C3 H7 113.118
C2 S1 C3 44.679 C2 C3 H6 118.318
C2 C3 H7 118.318 C3 C2 H4 118.318
C3 C2 H5 118.318 H4 C2 H5 116.396
H6 C3 H7 116.396
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability