From: Calculation of the visible-UV absorption spectra of hydrogen sulfide, bisulfide, polysulfides, and As and Sb sulfides, in aqueous solution
Reaction
ΔEg
ΔG VRT
ΔG COSMO
ΔG aq
ΔG exp
1/4 S8+SH- → S3H-
-14.6
+0.5
+ 18.9
+4.8
+4.9
3/8 S8 + SH- → S4H-
-19.2
+ 1.4
+21.6
+3.8
+3.7
1/2 S8+SH- → S5H-
-21.8
+2.4
+23.6
+4.3
5/8 S8+SH- → S6H-
-23.7
+3.3
+25.3
na