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: QCISD/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at QCISD/cc-pVDZ
 hartrees
Energy at 0K-835.713867
Energy at 298.15K 
HF Energy-835.251892
Nuclear repulsion energy140.598821
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 QCISD/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3103 2977 13.33      
2 A 2734 2623 2.74      
3 A 1457 1398 0.35      
4 A 1209 1159 0.66      
5 A 911 874 3.59      
6 A 646 619 2.79      
7 A 300 288 13.23      
8 A 232 222 5.28      
9 B 3166 3037 2.26      
10 B 2734 2623 5.57      
11 B 1269 1217 25.89      
12 B 1016 975 17.51      
13 B 785 753 20.38      
14 B 718 689 0.69      
15 B 260 250 37.98      

Unscaled Zero Point Vibrational Energy (zpe) 10269.1 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 9852.1 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 QCISD/cc-pVDZ
ABC
0.87376 0.10400 0.09729

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVDZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.785
S2 0.000 1.555 -0.181
S3 0.000 -1.555 -0.181
H4 0.890 -0.056 1.435
H5 -0.890 0.056 1.435
H6 1.116 1.273 -0.891
H7 -1.116 -1.273 -0.891

Atom - Atom Distances (Å)
  C1 S2 S3 H4 H5 H6 H7
C11.83141.83141.10261.10262.38232.3823
S21.83143.11102.44912.37741.35213.1223
S31.83143.11102.37742.44913.12231.3521
H41.10262.44912.37741.78262.68773.3032
H51.10262.37742.44911.78263.30322.6877
H62.38231.35213.12232.68773.30323.3857
H72.38233.12231.35213.30322.68773.3857

picture of Methanedithiol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 S2 H6 95.712 C1 S3 H7 95.712
S2 C1 S3 116.278 S2 C1 H4 110.708
S2 C1 H5 105.541 S3 C1 H4 105.541
S3 C1 H5 110.708 H4 C1 H5 107.867
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability