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: MP3/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP3/6-31+G**
 hartrees
Energy at 0K-835.659491
Energy at 298.15K 
HF Energy-835.217406
Nuclear repulsion energy141.902686
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 MP3/6-31+G**
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 3186 2964 8.66      
2 A 2810 2615 2.29      
3 A 1496 1392 0.97      
4 A 1253 1166 1.09      
5 A 955 889 6.37      
6 A 673 626 3.24      
7 A 325 303 16.91      
8 A 254 236 2.13      
9 B 3247 3021 1.17      
10 B 2809 2614 6.20      
11 B 1343 1250 26.03      
12 B 1063 989 34.87      
13 B 810 754 18.20      
14 B 759 706 0.76      
15 B 277 258 42.09      

Unscaled Zero Point Vibrational Energy (zpe) 10629.0 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 9890.3 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 MP3/6-31+G**
ABC
0.88953 0.10585 0.09892

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31+G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.781
S2 0.000 1.542 -0.180
S3 0.000 -1.542 -0.180
H4 0.875 -0.056 1.423
H5 -0.875 0.056 1.423
H6 1.093 1.264 -0.889
H7 -1.093 -1.264 -0.889

Atom - Atom Distances (Å)
  C1 S2 S3 H4 H5 H6 H7
C11.81711.81711.08601.08602.36262.3626
S21.81713.08452.42602.35421.33263.0937
S31.81713.08452.35422.42603.09371.3326
H41.08602.42602.35421.75272.67083.2674
H51.08602.35422.42601.75273.26742.6708
H62.36261.33263.09372.67083.26743.3414
H72.36263.09371.33263.26742.67083.3414

picture of Methanedithiol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 S2 H6 95.977 C1 S3 H7 95.977
S2 C1 S3 116.148 S2 C1 H4 110.843
S2 C1 H5 105.597 S3 C1 H4 105.597
S3 C1 H5 110.843 H4 C1 H5 107.598
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability