Formula (C4H6N2S4Zn)n Appearance pale yellow powder | Molar mass 275.8 g/mol Pubchem 3032296 | |
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Zineb is the chemical compound with the formula {Zn[S2CN(H)CH2CH2N(H)CS2]}n. Structurally, it is classified as a coordination polymer. This pale yellow solid is used as fungicide.
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Production and applications
It is produced by treating ethylene bis(dithiocarbamate) sodium salt, "nabam", with zinc sulfate. This procedure can be carried out by mixing nabam and zinc sulfate in a spray tank. Its uses include control of downy mildews, rusts and redfire disease. In the US it was once registered as a "General Use Pesticide", however all registrations were voluntarily cancelled following an EPA special review. It continues to be used in many other countries.
Structure
Zineb is a polymeric complex of zinc with the bis(dithiocarbamate) derived from the reaction. The polymer is composed of Zn(dithiocarbamate)2 subunits linked by ethylene backbone. A reference compound is [Zn(S2CNEt2)2]2, which features a pair of tetrahedral Zn centers bridged by one sulfur center.