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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: CCSD(T)/TZVP

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)/TZVP
 hartrees
Energy at 0K-476.073311
Energy at 298.15K-476.077769
HF Energy-475.593028
Nuclear repulsion energy100.354624
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)/TZVP
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 3155 3036        
2 A1 1522 1465        
3 A1 1150 1107        
4 A1 1082 1041        
5 A1 635 611        
6 A2 3240 3118        
7 A2 1208 1163        
8 A2 917 883        
9 B1 3254 3132        
10 B1 974 937        
11 B1 851 820        
12 B2 3151 3033        
13 B2 1494 1438        
14 B2 1110 1069        
15 B2 655 631        

Unscaled Zero Point Vibrational Energy (zpe) 12198.3 cm-1
Scaled (by 0.9625) Zero Point Vibrational Energy (zpe) 11740.8 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)/TZVP
ABC
0.73582 0.35046 0.26239

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.877
C2 0.000 0.742 -0.808
C3 0.000 -0.742 -0.808
H4 -0.916 1.250 -1.086
H5 0.916 1.250 -1.086
H6 0.916 -1.250 -1.086
H7 -0.916 -1.250 -1.086

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.84151.84152.50122.50122.50122.5012
C21.84151.48491.08351.08352.21052.2105
C31.84151.48492.21052.21051.08351.0835
H42.50121.08352.21051.83183.09932.5001
H52.50121.08352.21051.83182.50013.0993
H62.50122.21051.08353.09932.50011.8318
H72.50122.21051.08352.50013.09931.8318

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.223 S1 C2 H4 115.072
S1 C2 H5 115.072 S1 C3 C2 66.223
S1 C3 H6 115.072 S1 C3 H7 115.072
C2 S1 C3 47.554 C2 C3 H6 117.937
C2 C3 H7 117.937 C3 C2 H4 117.937
C3 C2 H5 117.937 H4 C2 H5 115.421
H6 C3 H7 115.421
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability