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All results from a given calculation for HSCH2SH (Methanedithiol)

using model chemistry: QCISD/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 QCISD/3-21G*
 hartrees
Energy at 0K-831.678938
Energy at 298.15K 
HF Energy-831.296800
Nuclear repulsion energy140.695653
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/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 3075 2955 8.66      
2 A 2719 2613 3.95      
3 A 1538 1478 3.22      
4 A 1266 1216 1.19      
5 A 950 913 5.18      
6 A 633 608 3.17      
7 A 304 292 19.46      
8 A 249 240 6.42      
9 B 3124 3003 1.14      
10 B 2718 2612 9.25      
11 B 1328 1277 12.76      
12 B 1060 1019 24.88      
13 B 759 730 0.35      
14 B 741 712 19.04      
15 B 259 249 43.71      

Unscaled Zero Point Vibrational Energy (zpe) 10361.4 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 9958.3 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 QCISD/3-21G*
ABC
0.86125 0.10456 0.09758

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.798
S2 0.000 1.551 -0.184
S3 0.000 -1.551 -0.184
H4 0.886 -0.049 1.441
H5 -0.886 0.049 1.441
H6 1.111 1.271 -0.887
H7 -1.111 -1.271 -0.887

Atom - Atom Distances (Å)
  C1 S2 S3 H4 H5 H6 H7
C11.83581.83581.09561.09562.38522.3852
S21.83583.10272.44622.38371.34423.1139
S31.83583.10272.38372.44623.11391.3442
H41.09562.44622.38371.77402.68573.3016
H51.09562.38372.44621.77403.30162.6857
H62.38521.34423.11392.68573.30163.3764
H72.38523.11391.34423.30162.68573.3764

picture of Methanedithiol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 S2 H6 95.956 C1 S3 H7 95.956
S2 C1 S3 115.353 S2 C1 H4 110.571
S2 C1 H5 106.041 S3 C1 H4 106.041
S3 C1 H5 110.571 H4 C1 H5 108.118
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability