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 HSCH2SH (Methanedithiol)

using model chemistry: CCSD(T)/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CCSD(T)/6-31G(2df,p)
 hartrees
Energy at 0K-835.797657
Energy at 298.15K 
HF Energy-835.230623
Nuclear repulsion energy141.578142
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)/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3118 3118        
2 A 2728 2728        
3 A 1474 1474        
4 A 1213 1213        
5 A 913 913        
6 A 649 649        
7 A 301 301        
8 A 227 227        
9 B 3180 3180        
10 B 2727 2727        
11 B 1274 1274        
12 B 1014 1014        
13 B 783 783        
14 B 719 719        
15 B 248 248        

Unscaled Zero Point Vibrational Energy (zpe) 10284.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 10284.3 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)/6-31G(2df,p)
ABC
0.87819 0.10575 0.09874

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31G(2df,p)

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.788
S2 0.000 1.543 -0.181
S3 0.000 -1.543 -0.181
H4 0.882 -0.053 1.427
H5 -0.882 0.053 1.427
H6 1.096 1.258 -0.900
H7 -1.096 -1.258 -0.900

Atom - Atom Distances (Å)
  C1 S2 S3 H4 H5 H6 H7
C11.82161.82161.09101.09102.37292.3729
S21.82163.08592.43092.36291.34173.0922
S31.82163.08592.36292.43093.09221.3417
H41.09102.43092.36291.76792.67923.2833
H51.09102.36292.43091.76793.28332.6792
H62.37291.34173.09222.67923.28333.3361
H72.37293.09221.34173.28332.67923.3361

picture of Methanedithiol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 S2 H6 96.021 C1 S3 H7 96.021
S2 C1 S3 115.784 S2 C1 H4 110.643
S2 C1 H5 105.694 S3 C1 H4 105.694
S3 C1 H5 110.643 H4 C1 H5 108.238
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability