return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C2H4S (Thiirane)

using model chemistry: QCISD(T)=FULL/cc-pV(T+d)Z

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(T)=FULL/cc-pV(T+d)Z
 hartrees
Energy at 0K-476.317733
Energy at 298.15K-476.322201
HF Energy-475.612896
Nuclear repulsion energy101.428611
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(T)=FULL/cc-pV(T+d)Z
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 3163 3163        
2 A1 1510 1510        
3 A1 1149 1149        
4 A1 1055 1055        
5 A1 649 649        
6 A2 3225 3225        
7 A2 1202 1202        
8 A2 904 904        
9 B1 3240 3240        
10 B1 968 968        
11 B1 837 837        
12 B2 3159 3159        
13 B2 1486 1486        
14 B2 1084 1084        
15 B2 690 690        

Unscaled Zero Point Vibrational Energy (zpe) 12159.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12159.6 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(T)=FULL/cc-pV(T+d)Z
ABC
0.73954 0.36192 0.26900

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/cc-pV(T+d)Z

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.863
C2 0.000 0.741 -0.794
C3 0.000 -0.741 -0.794
H4 -0.912 1.245 -1.069
H5 0.912 1.245 -1.069
H6 0.912 -1.245 -1.069
H7 -0.912 -1.245 -1.069

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.81471.81472.47282.47282.47282.4728
C21.81471.48281.07771.07772.20322.2032
C31.81471.48282.20322.20321.07771.0777
H42.47281.07772.20321.82413.08692.4903
H52.47281.07772.20321.82412.49033.0869
H62.47282.20321.07773.08692.49031.8241
H72.47282.20321.07772.49033.08691.8241

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.887 S1 C2 H4 115.108
S1 C2 H5 115.108 S1 C3 C2 65.887
S1 C3 H6 115.108 S1 C3 H7 115.108
C2 S1 C3 48.225 C2 C3 H6 117.868
C2 C3 H7 117.868 C3 C2 H4 117.868
C3 C2 H5 117.868 H4 C2 H5 115.611
H6 C3 H7 115.611
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability