Phenylimido Complexes of Technetium and Rhenium with Maleonitriledithiolate |
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Authors: | Bernd Kuhn Prof. Dr. Ulrich Abram |
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Affiliation: | Institute of Chemistry and Biochemistry, Freie Universit?t Berlin, Fabeckstrasse 34–36, 14195 Berlin, Germany |
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Abstract: | [Tc(NPh)Cl3(PPh3)2] or [Re(NPh)Cl3(PPh3)2] react with two equivalents of Na2mnt (mnt2– = 1,2‐dicyanoethene‐1,2‐dithiolate) with formation of anionic complexes of the composition [M(NPh)(mnt)2]–. The products can be isolated as large red blocks of their AsPh4+ salts. The complex anions contain square‐pyramidal coordinated metal atoms with the phenylimido ligands in apical positions. The M–N–C bonds are almost linear. A similar phenylimido complex with an additional amino group was synthesized from [Re(NC6H4‐4‐NH2)Cl3(PPh3)2]. The presence of such substituents may allow coupling of the metal complexes to biomolecules such as peptides, proteins, or sugars, provided the M=N bonds are sufficiently stable against hydrolysis. |
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Keywords: | Rhenium Technetium Crystal structure Phenylimido complexes Biomolecules |
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