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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: CCSD/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-476.043829
Energy at 298.15K-476.048266
HF Energy-475.576455
Nuclear repulsion energy99.973263
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/aug-cc-pVDZ
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 3154 3039 14.21      
2 A1 1501 1446 2.54      
3 A1 1150 1108 3.01      
4 A1 1045 1006 0.22      
5 A1 639 616 24.41      
6 A2 3240 3121 0.00      
7 A2 1197 1153 0.00      
8 A2 894 861 0.00      
9 B1 3254 3135 3.98      
10 B1 956 921 2.47      
11 B1 830 800 0.36      
12 B2 3148 3033 10.56      
13 B2 1467 1413 0.20      
14 B2 1064 1025 21.94      
15 B2 662 638 0.57      

Unscaled Zero Point Vibrational Energy (zpe) 12099.7 cm-1
Scaled (by 0.9634) Zero Point Vibrational Energy (zpe) 11656.9 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/aug-cc-pVDZ
ABC
0.72499 0.34958 0.26108

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.878
C2 0.000 0.747 -0.810
C3 0.000 -0.747 -0.810
H4 -0.926 1.262 -1.081
H5 0.926 1.262 -1.081
H6 0.926 -1.262 -1.081
H7 -0.926 -1.262 -1.081

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.84511.84512.50732.50732.50732.5073
C21.84511.49341.09351.09352.22802.2280
C31.84511.49342.22802.22801.09351.0935
H42.50731.09352.22801.85123.12952.5232
H52.50731.09352.22801.85122.52323.1295
H62.50732.22801.09353.12952.52321.8512
H72.50732.22801.09352.52323.12951.8512

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.128 S1 C2 H4 114.701
S1 C2 H5 114.701 S1 C3 C2 66.128
S1 C3 H6 114.701 S1 C3 H7 114.701
C2 S1 C3 47.745 C2 C3 H6 118.091
C2 C3 H7 118.091 C3 C2 H4 118.091
C3 C2 H5 118.091 H4 C2 H5 115.655
H6 C3 H7 115.655
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability