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Structure and reactivity of low valent metal complexes containing tridentate B-enaminone ligand

Authors: Olejník Roman | Růžičková Zdeňka | Růžička Aleš

Year: 2016

Type of publication: ostatní - přednáška nebo poster

Page from-to: nestránkováno

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Language	Name	Abstract	Keywords
eng	Structure and reactivity of low valent metal complexes containing tridentate B-enaminone ligand	One of the most preferred directions in coordination chemistry is synthesis of low valent species, where central atom is stabilized by spectator ligand as β-diketimine or β enaminone (BEN). Resulting complexes reveal plethora potential applications mainly in chemical transformations or catalysis. Tridentate BEN may be classified among the most widespread systems chelating metal centers and thus form six membered metallacycles. The central fragment consists of NC3O skeleton and renders space for variation a number of its substituents or could by formally a part of hetero/aromatic rings. Also nitrogen atom could be substituted by different entities with tunable steric demand and character. The preparation of target complexes can be classified into two main reaction procedures. The first one is transmetallation of deprotonated ketoimine species with metal dichloride MCl2 (M (II) = Sn, Ge, Zn). The second pathway is protolithic reaction of a pro-ligand and an appropriate reactive compound such as metal bisamide (M[N(TMS)2]2, M(II) = Ge, Sn, Pb) or metal alkyls (ZnR2, R = Me, Et), which produced desired products via an amine or alkyl elimination route. Obtained complexes were used for further tests of its reactivity or as co-initiators for co/polymerization reactions (ε-caprolactone, trimethylene carbonate etc.).	enaminone, complexes, tetrylenes, NMR, X-ray