Maleonitrile dithiolate

Synthesis. These macrocycles are prepared from seven-membered ring dinitrile complexes, 84a-84c (Scheme 17), which contain either methylene, sulfur or oxygen in the five position (129). These cyclic dinitriles are synthesized by alkylating maleonitrile dithiolate or derivatives thereof with the corresponding dihalide. The dinitriles 84a-84c can be cyclized in magnesium propoxide to form porphyrazines 85a (33%), 85b (19%), and 85c (27%) (Scheme 17), which can be demetalated with trifluoroacetic to form 86a-86c. Additionally, 86a has been remetalated with nickel (87a, 92%), copper (88a, 95%), and zinc (89a, 94%). The sulfur and oxygen derivatives 85b, 85c, 86b, and 86c are of low solubility and are not suitable for further manipulation. 

The chloride ions of 143 are displaced by reaction with the dithiolene chelates, disodium maleonitrile dithiolate (Na2 mnt), benzene dithiolate (bdt)... 

Like metal chelates of some other dithio ligands, e.g. maleonitrile dithiolate, dithio-/J-diketonato complexes undergo reversible redox reactions in non-aqueous solvents. The square-planar complexes [ML2] (M = Co, Ni, Pd and Pt) exhibit two consecutive one-electron reductions as shown in equation (5).252,253... 

The anion [OsNC14] can be obtained as its (Bu4N)+ salt by interaction of sodium azide solution.with an HC1 solution of potassium osmate. It reacts with maleonitrile dithiolate to give (Bu4N)2[OsN(mnt)2].115... 

Three 1 1 Fe Cu model compounds have been reported, each of which contains a dmuclear anion in which an iron(III) porphyrin and a copper(II) maleonitrile dithiolate are bridged by one of the thiolate anions. The other ligand to Fe in each case is THF. The cations of the three compounds are either [TPPFe(THF)2]+, [TPPGa(THF)2]+, or [TPPA1(THF)(H20)]+ (Figure 8(e)). The structural results and the Mossbauer parameters suggest that the Fe center in... 

The structures of typical ligands were shown earlier in Figure 1.9 and will also be shown later in Figures 3.1 and 3.2. Complexes include some metal halides, hydrates, amines, amides and imides, such as Ti(NR2)4 (R is an alkyl group), oxides, H3B NR3 (a borane-amine adduct), Co(MNT)2 (MNT = maleonitrile dithiolate), Cupc (pc = phthalocyanine), Mo(CO)6, cluster carbonyls, and metal acetylacetonate derivatives. 

For platinum(II), Balch and coworkers [78] have studied the reaction of a biscar-bene platinum(II) dicyanide complex with thallium(I) in basic solution (Scheme 18). They obtained two polymorphs involving Pt -Xl contacts a yellow dimeric structure and a red extended structure. Subsequent work by the same authors [79] showed that replacement of the CN ligands with dimethylglyoxime or maleonitrile dithiolate provides access to a range of extended structures based on Pt i Xl interactions. 

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

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