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Hemilabile amino-amides as N,N-chelating systems for main group metals

Autoři: Kampová Hana | Riemlová Emílie | Klikarová Jitka | Padělková Zdeňka | Růžička Aleš

Rok: 2013

Druh publikace: ostatní - přednáška nebo poster

Strana od-do: nestránkováno

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Jazyk	Název	Abstrakt	Klíčová slova
eng	Hemilabile amino-amides as N,N-chelating systems for main group metals	Metal amides (inorganic ones of formula R2NM) are among the most studied and used compounds in catalysis and new materials preparation.[1] Even though one of the first work on low valent Group 14 metal amides was reported by Lappert in 1974 [2] and many compounds were prepared and structurally characterized, amides containing both group 14 metals and an adjacent amino functionality remain rather uncommon.[3] Such compounds are nearly restricted to pyridine derivatives with the intramolecular donor interaction from the amino nitrogen atom to the metal. The successful stabilization of low-valent group 14 metals and the special chemical behavior of compounds containing a [2-(dimethylamino)methyl]phenyl- ligand (Figure 1, LCN ligand) prompted us to explore the chemistry of lower valent complexes of heavier group 14 metals with [2-(dimethylamino)methyl]aniline as a ligand (Figure 1, LNN1 and LNN2 ligands).[4] Thus, this ligand contains both the amido functionality, prone to strong nitrogen to metal covalent bonds, and the pendant amino group for the formation of a weaker intramolecular donor-acceptor interaction, which together give rise to a six-membered diazametalla ring, similar to related ?-diketiminato ligand-substituted tetrylenes.[5] The steric protection at the amido functionality is expected to be very variable and, together with the hemilabile coordination of the amino group, would give rise to structure fine-tuning. We reported on the structure and reactivity of group 14 metal complexes containing LNN1 and LNN2 ligands recently.[4] Now we would like to expand our investigation to the field complexes containing an organic group or H-substituted ligands (LNN, LNNC) and other metals like Mg, Zn, Al etc. Structures of products and its reactivity together with a comparison to other chelated complexes will be presented.

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