"The comparison between thiourea and dithiooxamide thioamide and enol forms"
I would write "enthiol" or "thioenol" for A=C-SH sequence.
Beware that since dithiooxamide is bifunctional just like you chloroacetal that you may have different possible products...
1°) the product you want with two cyclopentarings...thus intramolecular cyclisation via geminal N and S on the
same C.
2°) a similar product with two cyclohexarings...thus intramolecular cyclisation via viccinal N and S from
different initially neightbourgs C.
3°) a polymer kind of linear with cycli inbetween (I can imagine two types) from the binding of different dithiooxamide molécules via intermolecular bridging.
4°) a mix of intramolecular cyclisation and intermolecular bridging with limited lenght and Molecular Weight.
The color is highly probable because of the hyperconjugaison of the molecule all sp2 are resonating and the free S doublets propagates the
"aromaticity".
[Edited on 12-8-2016 by PHILOU Zrealone] |