1.1- dicyanoethylene-2,2-dithiolate

Soederbaeck cyclized the readily available dicyanoethylene-dithiolate (17) with sulfur to give a trisubstituted isothiazole (18). 

A ruthenium(lV) complex with six sulfur donor atoms, [Ru (mnt)3] (143), is formed by oxidation of [Ru (mnt)3] (mnt = 1,2-dicyanoethylene dithiolate) with I2, H2O2, or Ce. The complex is paramagnetic with a magnetic moment of 2.84 The Ru—5 distances range from... 

Dinitrile [20654-67-5]. 2,3-Dimercapto-2-butenedinitrile. Maleonitrile dithiolate. 1,2-Dicyanoethylene dithiolate C4H2N2S2 M 142.205... 

In the synthesis of the parent dithiolenes, the reaction of the disodium salt of ethylene-cts-dithiolate with metal salts is the only useful method.15 For the preparation of substituted dithiolenes the use of substituted ethylenedithiolates is the most efficient choice. In the synthesis of 1,2-dicyanoethylene-l,2-dithiolato ( mnt ) complexes, it is the only available method.16... 

Transition metal complexes (1) of 1,2-dicyanoethylene-1,2-dithiol (maleonitrile), mnt, have received special study since this ligand can stabilize transition metals in a variety of oxidation states and the high electron affinity of the terminal cyanide groups aids the delocalization of charge within the complex, thus reducing potential coulombic repulsions. 

Indium(III) complexes of dianionic sulfur ligands are mostly those derived from toluene-3,4-dithiolate (TDT ), l,2-dicyanoethylene-l,2-dithiolate (MNT ), 1,2-ethanedithiol (EDT ), or l,l-dicyanoethylene-2,2-dithiolate (i-MNT ). Various adducts (e.g., four-coordinate [In(MNT)2], five-coordinate [XIn( -MNT)2] (X = C1, Br, or I), or six-coordinate [In( -MNT)3] ) have been reported. " ... 

The two best characterized examples are (Ph4P)3[Os(mnt)3] (mnt = cis-l,2-dicyanoethylene-l,2-dithiolate), made from [OsBr ] " and the sodium salt of the ligand with Na2S204 Os(tdt)j (tdt = toluene-3,4-dithiol), a black material made from the hand and [OsBr ] in base, and (Me4N)[Os(tdt)3] for which a similar reaction is used but sodium dithionite is used as reducing agent. The ESR spectrum of [Os(mnt)3] has been measured and also IR and electronic spectra on the tdt complexes. Cyclic voltammetric studies on Os(tdt)3 show that the redox system in equation (10) exists. ... 

The polarographic reduction of a number of InL complexes (L = toluene-3,4-dithiolate) [InL2D] (D = phen, bipy, etc.), InLl" (L= l,2-dicyanoethylene-l,2-dithiolate), etc., in non-aqueous solution demonstrated a series of reversible one-electron changes corresponding formally to In ->In In - In°, in contrast to the In - In° reduction observed in aqueous solution. As noted above (Section 25.2.3.3), the formal oxidation states are assigned to the metal on the assumption that the ligand itself is not reduced, and this remains to be confirmed experimentally. 

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