return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for HSCH2SH (Methanedithiol)

using model chemistry: MP2=FULL/6-311G*

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=FULL/6-311G*
 hartrees
Energy at 0K-835.909089
Energy at 298.15K 
HF Energy-835.256599
Nuclear repulsion energy141.917275
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=FULL/6-311G*
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 251 238 8.21 10.63 0.65 0.79
2 A 311 295 19.43 10.26 0.70 0.82
3 A 669 633 2.67 13.34 0.17 0.29
4 A 931 882 6.70 7.29 0.49 0.66
5 A 1259 1193 2.63 14.12 0.67 0.80
6 A 1486 1407 2.71 12.82 0.73 0.84
7 A 2691 2548 1.26 135.69 0.17 0.30
8 A 3128 2963 8.21 94.03 0.10 0.18
9 B 268 254 46.02 2.84 0.75 0.86
10 B 732 694 1.55 0.78 0.75 0.86
11 B 806 763 25.96 8.91 0.75 0.86
12 B 1047 991 36.23 4.94 0.75 0.86
13 B 1330 1260 21.27 1.35 0.75 0.86
14 B 2690 2548 4.22 96.88 0.75 0.86
15 B 3190 3022 0.97 65.34 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10394.7 cm-1
Scaled (by 0.9471) Zero Point Vibrational Energy (zpe) 9844.8 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=FULL/6-311G*
ABC
0.89899 0.10558 0.09903

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-311G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.770
S2 0.000 1.542 -0.180
S3 0.000 -1.542 -0.180
H4 0.877 -0.054 1.415
H5 -0.877 0.054 1.415
H6 1.136 1.293 -0.852
H7 -1.136 -1.293 -0.852

Atom - Atom Distances (Å)
  C1 S2 S3 H4 H5 H6 H7
C11.81121.81121.08971.08972.36462.3646
S21.81123.08502.42052.35101.34343.1274
S31.81123.08502.35102.42053.12741.3434
H41.08972.42052.35101.75632.64933.2747
H51.08972.35102.42051.75633.27472.6493
H62.36461.34343.12742.64933.27473.4418
H72.36463.12741.34343.27472.64933.4418

picture of Methanedithiol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 S2 H6 95.970 C1 S3 H7 95.970
S2 C1 S3 116.775 S2 C1 H4 110.630
S2 C1 H5 105.565 S3 C1 H4 105.565
S3 C1 H5 110.630 H4 C1 H5 107.395
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability