Nickel Bis(stilbenedithiolate) on:
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Nickel bis(stilbenedithiolate) or bis(dithiobenzil)nickel is a coordination complex with the formula Ni(S2C2Ph2)2 (where Ph = phenyl). It exists as a black solid that gives green solutions in toluene due to a strong absorption at 855 nm. The complex is a prototype of a large family of bis( dithiolene) complexes or the formula Ni(S2C2R2)2 (R = H, alkyl, aryl). These complexes have attracted much attention as 
The complex was prepared originally by treating nickel sulfide with diphenylacetylene. High yielding syntheses involve treating nickel salts with sulfided benzoin. The complex reacts with ligands to form monodithiolene complexes of the type Ni(S2C2Ph2)L2.
dye
A dye is a colored substance that chemically bonds to the substrate to which it is being applied. This distinguishes dyes from pigments which do not chemically bind to the material they color. Dye is generally applied in an aqueous solution an ...
s. They are of academic interest because the dithiolenes are noninnocent ligands. The lengths of the C-S and C-C bonds in the backbone, respectively 1.71 and 1.39 Å, are intermediate between double and single bonds.
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The complex was prepared originally by treating nickel sulfide with diphenylacetylene. High yielding syntheses involve treating nickel salts with sulfided benzoin. The complex reacts with ligands to form monodithiolene complexes of the type Ni(S2C2Ph2)L2.
References
{{Reflist Coordination complexes Chelating agents Coordination chemistry