[suiza]

Hello
I'm writing about TBT from ecological sight, but I've got a problem with translation one process the setting in cycle biogeochemical of organotins.
 "sulphide-mediated disproportionation reactions" - Is it possible to describe this reaction in different way. I know what sulphide is, however I do not know about what concretely walks in this reaction.I thank for every help
Salute suiza

[HP]

Disproportionation reactions of what compound and what products expected?

[suiza]

This is a Fig.1 with biogeochemical cycling organotins, and this reaction "h". I marked this process on red