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Sodium maleonitriledithiolate

Sodium maleonitriledithiolate
IUPAC name sodium cis-1,2-dicyano-1,2-ethylenedithiolate
Other names sodium mnt sodium maleonitriledithiolate
Molecular formula C4N2Na2S2
Molar mass 186.17
Appearance yellow solid
Solubility in water ethanol, DMF
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

Sodium maleonitriledithiolate is the chemical compound described by the formula Na2S2C2(CN)2. The name refers to the cis compound, formally derived from maleonitrile. The dianion is a "dithiolene", i.e. a chelating alkene-1,2-dithiolate that serves as a non-innocent ligand for transition metals. Several complexes are known, such as [Ni(mnt)2]2-.

The salt is synthesized by treating carbon disulfide with sodium cyanide to give the cyanodithioformate salt, which eliminates elemental sulfur in aqueous solution:[1]

2 NaCN + 2 CS2 → Na2S2C2(CN)2 + 1/4 S8

The compound was first described by Bähr and Schleitzer 1958.[2]


  1. ^ R. H. Holm, A. Davison "Metal Complexes Derived from cis-1,2-Dicyano-1,2-Ethylenedithiolate and Bis(trifluoromethyl)-1,2-Dithiete" Inorganic Syntheses 1967, volume X, pp.8-26.
  2. ^ G. Bähr and G. Schleitzer (1957). "Beiträge zur Chemie des Schwefelkohlenstoffs und Selenkohlenstoffs, II. Die Kondensierende Spontan-Entschwefelung von Salzen und Estern der Cyan-Dithioameisensäure. Freie Cyan-Dithioameisensäure". Chemische Berichte 90: 438-443. doi:10.1002/cber.19570900322.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Sodium_maleonitriledithiolate". A list of authors is available in Wikipedia.
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