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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: QCISD/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 QCISD/TZVP
 hartrees
Energy at 0K-476.056259
Energy at 298.15K-476.060744
HF Energy-475.593306
Nuclear repulsion energy100.653476
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 QCISD/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 3174 3032 12.40      
2 A1 1537 1468 4.65      
3 A1 1163 1111 5.39      
4 A1 1092 1043 0.15      
5 A1 645 616 25.29      
6 A2 3257 3112 0.00      
7 A2 1220 1165 0.00      
8 A2 927 885 0.00      
9 B1 3271 3125 8.65      
10 B1 985 941 4.01      
11 B1 859 820 0.05      
12 B2 3170 3028 12.44      
13 B2 1507 1439 0.06      
14 B2 1126 1076 46.90      
15 B2 673 643 1.22      

Unscaled Zero Point Vibrational Energy (zpe) 12302.6 cm-1
Scaled (by 0.9553) Zero Point Vibrational Energy (zpe) 11752.7 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 QCISD/TZVP
ABC
0.73860 0.35313 0.26411

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.874
C2 0.000 0.741 -0.804
C3 0.000 -0.741 -0.804
H4 -0.914 1.248 -1.083
H5 0.914 1.248 -1.083
H6 0.914 -1.248 -1.083
H7 -0.914 -1.248 -1.083

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.83451.83452.49482.49482.49482.4948
C21.83451.48171.08201.08202.20692.2069
C31.83451.48172.20692.20691.08201.0820
H42.49481.08202.20691.82783.09442.4969
H52.49481.08202.20691.82782.49693.0944
H62.49482.20691.08203.09442.49691.8278
H72.49482.20691.08202.49693.09441.8278

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.181 S1 C2 H4 115.164
S1 C2 H5 115.164 S1 C3 C2 66.181
S1 C3 H6 115.164 S1 C3 H7 115.164
C2 S1 C3 47.638 C2 C3 H6 117.978
C2 C3 H7 117.978 C3 C2 H4 117.978
C3 C2 H5 117.978 H4 C2 H5 115.278
H6 C3 H7 115.278
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability