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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: CCSD(T)/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 CCSD(T)/6-311G*
 hartrees
Energy at 0K-476.036837
Energy at 298.15K-476.041312
HF Energy-475.582283
Nuclear repulsion energy100.681910
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 CCSD(T)/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 3125 3008        
2 A1 1525 1468        
3 A1 1159 1115        
4 A1 1078 1038        
5 A1 652 628        
6 A2 3208 3088        
7 A2 1209 1164        
8 A2 937 901        
9 B1 3222 3101        
10 B1 991 954        
11 B1 854 822        
12 B2 3121 3004        
13 B2 1494 1439        
14 B2 1107 1065        
15 B2 673 648        

Unscaled Zero Point Vibrational Energy (zpe) 12177.2 cm-1
Scaled (by 0.9626) Zero Point Vibrational Energy (zpe) 11721.8 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 CCSD(T)/6-311G*
ABC
0.73024 0.35630 0.26511

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/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 0.745 -0.799
C3 0.000 -0.745 -0.799
H4 -0.919 1.255 -1.081
H5 0.919 1.255 -1.081
H6 0.919 -1.255 -1.081
H7 -0.919 -1.255 -1.081

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82751.82752.49512.49512.49512.4951
C21.82751.49061.08821.08822.21932.2193
C31.82751.49062.21932.21931.08821.0882
H42.49511.08822.21931.83833.11112.5099
H52.49511.08822.21931.83832.50993.1111
H62.49512.21931.08823.11112.50991.8383
H72.49512.21931.08822.50993.11111.8383

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.932 S1 C2 H4 115.328
S1 C2 H5 115.328 S1 C3 C2 65.932
S1 C3 H6 115.328 S1 C3 H7 115.328
C2 S1 C3 48.136 C2 C3 H6 117.927
C2 C3 H7 117.927 C3 C2 H4 117.927
C3 C2 H5 117.927 H4 C2 H5 115.264
H6 C3 H7 115.264
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability