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/CEP-121G*

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/CEP-121G*
 hartrees
Energy at 0K-28.075943
Energy at 298.15K 
HF Energy-27.683127
Nuclear repulsion energy38.874346
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/CEP-121G*
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 244 232 3.50 7.75 0.53 0.70
2 A 316 301 20.97 5.99 0.64 0.78
3 A 664 632 4.56 14.04 0.15 0.26
4 A 921 878 5.45 6.68 0.38 0.55
5 A 1231 1173 1.02 16.51 0.66 0.80
6 A 1491 1420 1.31 12.03 0.75 0.86
7 A 2717 2589 0.63 128.31 0.14 0.24
8 A 3116 2969 12.04 99.06 0.09 0.17
9 B 268 256 48.49 0.59 0.75 0.86
10 B 733 699 1.09 1.76 0.75 0.86
11 B 799 761 26.21 9.14 0.75 0.86
12 B 1033 985 25.18 5.25 0.75 0.86
13 B 1313 1251 31.61 2.13 0.75 0.86
14 B 2716 2588 2.76 85.72 0.75 0.86
15 B 3190 3039 2.33 65.31 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10375.6 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 9885.9 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/CEP-121G*
ABC
0.87469 0.10456 0.09778

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.788
S2 0.000 1.551 -0.181
S3 0.000 -1.551 -0.181
H4 0.884 -0.054 1.427
H5 -0.884 0.054 1.427
H6 1.118 1.271 -0.887
H7 -1.118 -1.271 -0.887

Atom - Atom Distances (Å)
  C1 S2 S3 H4 H5 H6 H7
C11.82911.82911.09271.09272.38092.3809
S21.82913.10242.43872.36881.35103.1163
S31.82913.10242.36882.43873.11631.3510
H41.09272.43872.36881.77192.67683.2929
H51.09272.36882.43871.77193.29292.6768
H62.38091.35103.11632.67683.29293.3851
H72.38093.11631.35103.29292.67683.3851

picture of Methanedithiol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 S2 H6 95.781 C1 S3 H7 95.781
S2 C1 S3 116.007 S2 C1 H4 110.618
S2 C1 H5 105.553 S3 C1 H4 105.553
S3 C1 H5 110.618 H4 C1 H5 108.353
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability