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: MP4/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP4/6-311+G(3df,2p)
 hartrees
Energy at 0K-835.885671
Energy at 298.15K 
HF Energy-835.289827
Nuclear repulsion energy141.927953
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 MP4/6-311+G(3df,2p)
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 3074 2901        
2 A 2706 2554        
3 A 1464 1382        
4 A 1209 1141        
5 A 912 860        
6 A 647 611        
7 A 295 279        
8 A 217 205        
9 B 3133 2957        
10 B 2705 2553        
11 B 1265 1194        
12 B 1009 953        
13 B 781 737        
14 B 715 675        
15 B 240 226        

Unscaled Zero Point Vibrational Energy (zpe) 10185.6 cm-1
Scaled (by 0.9438) Zero Point Vibrational Energy (zpe) 9613.2 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 MP4/6-311+G(3df,2p)
ABC
0.88607 0.10615 0.09921

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-311+G(3df,2p)

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.782
S2 0.000 1.540 -0.180
S3 0.000 -1.540 -0.180
H4 0.881 -0.054 1.422
H5 -0.881 0.054 1.422
H6 1.101 1.261 -0.891
H7 -1.101 -1.261 -0.891

Atom - Atom Distances (Å)
  C1 S2 S3 H4 H5 H6 H7
C11.81531.81531.09041.09042.36692.3669
S21.81533.07932.42532.35561.34023.0927
S31.81533.07932.35562.42533.09271.3402
H41.09042.42532.35561.76552.66993.2767
H51.09042.35562.42531.76553.27672.6699
H62.36691.34023.09272.66993.27673.3491
H72.36693.09271.34023.27672.66993.3491

picture of Methanedithiol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 S2 H6 96.026 C1 S3 H7 96.026
S2 C1 S3 116.025 S2 C1 H4 110.674
S2 C1 H5 105.598 S3 C1 H4 105.598
S3 C1 H5 110.674 H4 C1 H5 108.107
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability