Zineb is the chemical compound with the formula
n. Structurally, it is classified as a
coordination polymer
A coordination polymer is an inorganic or organometallic polymer structure containing metal cation centers linked by ligands. More formally a coordination polymer is a coordination compound with repeating coordination entities extending in 1, 2, o ...
and a
dithiocarbamate complex 133px, Tris(dithiocarbamate) complexes have idealized D3 symmetry.
Transition metal dithiocarbamate complexes are coordination complexes containing one or more dithiocarbamate ligand, which are typically abbreviated R2dtc−. Many complexes are k ...
. This pale yellow solid is used as
fungicide
Fungicides are biocidal chemical compounds or biological organisms used to kill parasitic fungi or their spores. A fungistatic inhibits their growth. Fungi can cause serious damage in agriculture, resulting in critical losses of yield, quality, ...
.
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.
[Michael A. Kamrin, (1997) Pesticide Profiles: Toxicity, Environmental Impact, and Fate, CRC Press, ]
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
The Environmental Protection Agency (EPA) is an independent executive agency of the United States federal government tasked with environmental protection matters. President Richard Nixon proposed the establishment of EPA on July 9, 1970; it be ...
special review.
It continues to be used in many other countries.
Structure
Zineb is a polymeric
complex of
zinc
Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodi ...
with a
dithiocarbamate.
[ The polymer is composed of Zn(dithiocarbamate)2 subunits linked by an ethylene (-CH2CH2-) backbone. A reference compound is n(S2CNEt2)2sub>2, which features a pair of tetrahedral Zn centers ]bridged
Bridging may refer to:
Construction
* Building of bridges across a gap
* Cross bracing used between joists to stabilize them
Electronics and computing
* In electronics, using a low source impedance to drive a large load impedance for maximum vol ...
by one sulfur center.[Bonamico, M.; Mazzone, G.; Vaciago, A.; Zambonelli, L., "Structural studies of metal dithiocarbamates. III. The Crystal and Molecular Structure of Zinc Diethyldithiocarbamate", Acta Crystallogr. 1965, volume 19, pp. 898-909. ]
See also
* Metam sodium - A related dithiocarbamate salt which is also used as a fungicide.
* Maneb - ethylene bis(dithiocarbamate) with manganese
Manganese is a chemical element with the symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. Manganese is a transition metal with a multifaceted array of industrial alloy use ...
instead of zinc.
* Mancozeb - A common fungicide containing Zineb and Maneb.
References
External links
*{{PPDB, 683
Fungicides
Endocrine disruptors
Zinc compounds
Dithiocarbamates