Ferric Dimethyldithiocarbamate
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Iron tris(dimethyldithiocarbamate) is the coordination complex of iron with dimethyldithiocarbamate with the formula Fe(S2CNMe2)3 (Me = methyl). It is marketed as a fungicide.


Synthesis, structure, bonding

Iron tris(dithiocarbamate)s are typically are prepared by salt metathesis reactions. Iron tris(dimethyldithiocarbamate) is an octahedral coordination complex of iron(III) with D3 symmetry group, symmetry. Spin crossover (SCO) was first observed in 1931 by Cambi ''et al.'' who discovered anomalous magnetic behavior for the tris(N,N-dialkyldithiocarbamatoiron(III) complexes. The spin states of these complexes are sensitive to the nature of the amine substituents.


Reactions

Iron tris(dithiocarbamate)s react with nitric oxide to give a nitrosyl complex: : This efficient chemical trapping reaction provides a means to detect NO. Reflecting the strongly donating properties of dithiocarbamate ligands, iron tris(dithiocarbamate)s oxidize at relatively mild potentials to give isolable iron(IV) derivatives [Fe(S2CNR2)3]+. Iron tris(dithiocarbamate)s react with hydrochloric acid to give the pentacoordinate chloride: :


Safety

The U.S. Occupational Safety and Health Administration (OSHA) has set the legal (permissible exposure limit) for ferbam exposure in the workplace as 15 mg/m3 over an 8-hour workday. The U.S. National Institute for Occupational Safety and Health (NIOSH) has set a recommended exposure limit (REL) of 1 mg/m3 over an 8-hour workday. At levels of 800 mg/m3, ferbam is immediately dangerous to life and health.


See also

* Zinc dimethyldithiocarbamate - a related dimethyldithiocarbamate complex of zinc * Nickel bis(dimethyldithiocarbamate) - a related dimethyldithiocarbamate complex of nickel * Iron tris(diethyldithiocarbamate) - a related dimethyldithiocarbamate complex of iron


References

{{reflist Fungicides Dithiocarbamates Iron(III) compounds Iron complexes