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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: MP2/CEP-121G

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/CEP-121G
 hartrees
Energy at 0K-23.381695
Energy at 298.15K-23.386083
HF Energy-23.144683
Nuclear repulsion energy36.416111
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/CEP-121G
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 3109 3034 9.06      
2 A1 1513 1477 1.99      
3 A1 1148 1121 1.58      
4 A1 1092 1066 7.56      
5 A1 577 563 15.67      
6 A2 3215 3138 0.00      
7 A2 1223 1194 0.00      
8 A2 918 896 0.00      
9 B1 3232 3155 14.71      
10 B1 923 901 4.79      
11 B1 860 839 0.15      
12 B2 3099 3025 10.81      
13 B2 1489 1453 2.16      
14 B2 1109 1083 57.60      
15 B2 587 573 3.75      

Unscaled Zero Point Vibrational Energy (zpe) 12047.6 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 11758.5 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/CEP-121G
ABC
0.71298 0.31280 0.23871

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.255
C2 0.000 0.755 -0.542
C3 0.000 -0.755 -0.542
H4 -0.926 1.271 -0.799
H5 0.926 1.271 -0.799
H6 0.926 -1.271 -0.799
H7 -0.926 -1.271 -0.799

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.94861.94862.58642.58642.58642.5864
C21.94861.50981.09081.09082.24202.2420
C31.94861.50982.24202.24201.09081.0908
H42.58641.09082.24201.85233.14472.5412
H52.58641.09082.24201.85232.54123.1447
H62.58642.24201.09083.14472.54121.8523
H72.58642.24201.09082.54123.14471.8523

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 67.206 S1 C2 H4 113.613
S1 C2 H5 113.613 S1 C3 C2 67.206
S1 C3 H6 113.613 S1 C3 H7 113.613
C2 S1 C3 45.588 C2 C3 H6 118.214
C2 C3 H7 118.214 C3 C2 H4 118.214
C3 C2 H5 118.214 H4 C2 H5 116.217
H6 C3 H7 116.217
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability