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: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-831.633043
Energy at 298.15K 
HF Energy-831.297254
Nuclear repulsion energy141.178915
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 MP2/3-21G*
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 253 241 5.86 12.73 0.63 0.78
2 A 313 298 22.59 11.05 0.69 0.82
3 A 644 613 4.24 14.32 0.18 0.30
4 A 956 909 5.72 12.81 0.64 0.78
5 A 1281 1219 1.27 25.35 0.71 0.83
6 A 1557 1481 3.25 20.54 0.73 0.85
7 A 2789 2653 1.38 99.77 0.17 0.29
8 A 3127 2975 6.08 76.96 0.12 0.21
9 B 268 255 49.53 2.29 0.75 0.86
10 B 751 714 25.22 5.40 0.75 0.86
11 B 769 731 0.62 6.70 0.75 0.86
12 B 1068 1016 24.90 7.49 0.75 0.86
13 B 1344 1279 15.60 4.24 0.75 0.86
14 B 2788 2652 3.36 77.73 0.75 0.86
15 B 3182 3027 0.44 58.82 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10544.9 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 10031.3 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 MP2/3-21G*
ABC
0.86654 0.10529 0.09824

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.796
S2 0.000 1.546 -0.183
S3 0.000 -1.546 -0.183
H4 0.883 -0.050 1.436
H5 -0.883 0.050 1.436
H6 1.103 1.266 -0.888
H7 -1.103 -1.266 -0.888

Atom - Atom Distances (Å)
  C1 S2 S3 H4 H5 H6 H7
C11.83001.83001.09211.09212.37762.3776
S21.83003.09202.43952.37471.33803.1018
S31.83003.09202.37472.43953.10181.3380
H41.09212.43952.37471.76952.67953.2896
H51.09212.37472.43951.76953.28962.6795
H62.37761.33803.10182.67953.28963.3584
H72.37763.10181.33803.28962.67953.3584

picture of Methanedithiol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 S2 H6 96.022 C1 S3 H7 96.022
S2 C1 S3 115.305 S2 C1 H4 110.649
S2 C1 H5 105.941 S3 C1 H4 105.941
S3 C1 H5 110.649 H4 C1 H5 108.226
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability