Issue 3, 2000

Synthesis and characterization of two novel tetranuclear sodium ketoiminate complexes; structural evidence for formation of dative Na  F and Na–C (olefin) bonding interactions

Abstract

Treatment of fluorinated β-ketoiminate ligands MokeimH or AlkeimH with NaH in THF solution afforded the corresponding ketoiminatosodium complexes [Na(Mokeim)]41 and [Na(Alkeim)]42, MokeimH = (CF3)C([double bond, length half m-dash]O)CH[double bond, length half m-dash]C(CF3)NH(CH2CH2OMe) and AlkeimH = (CF3)C([double bond, length half m-dash]O)CH[double bond, length half m-dash]C(CF3)NH(CH2CH[double bond, length half m-dash]CH2). These new complexes were characterized by spectroscopic methods, elemental analyses and X-ray diffraction studies. Complex 1 consists of a tetrameric Na4O4 cubane core arrangement, of which each sodium atom is surrounded by a tridentate ketoiminato ligand, two oxygen atoms from nearby ketoiminato ligands, and one or two weak Na  F dative interactions. The core structure of 2 is similar, but with formation of the uncommon allyl to sodium π interaction. The stabilization of this Na–C (olefin) bonding interaction is as effective as the Na–O (ether) dative bonding in 1 because 2 shows comparable thermal stability and even an enhanced volatility during sublimation.

Supplementary files

Article information

Article type
Paper
Submitted
18 Oct 1999
Accepted
07 Dec 1999
First published
14 Jan 2000

J. Chem. Soc., Dalton Trans., 2000, 343-347

Synthesis and characterization of two novel tetranuclear sodium ketoiminate complexes; structural evidence for formation of dative Na  F and Na–C (olefin) bonding interactions

Y. Chi, S. Ranjan, P. Chung, C. Liu, S. Peng and G. Lee, J. Chem. Soc., Dalton Trans., 2000, 343 DOI: 10.1039/A908328F

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