Arylaminopyridinato complexes of zirconium
UNSPECIFIED. (2004) Arylaminopyridinato complexes of zirconium. DALTON TRANSACTIONS (15). pp. 2257-2266. ISSN 1477-9226Full text not available from this repository.
Official URL: http://dx.doi.org/10.1039/b407008a
A range of 2-arylaminopyridines (HL) are synthesised readily from bromopyridines and amines using palladium-catalysed amination. Protonolysis reactions of these proligands with ZrX4 (X = NMe2, CH2Ph, CH2But) yield zirconium complexes of the type [MLnX4-n], several of which have been characterised by X-ray crystallography. Control of metal/ligand stoichiometry and structure is pursued by investigation of the effects on substitution patterns of the pyridine and aryl rings. Some distinct patterns emerged; (i) the 6-methyl position on the pyridine appears to be particularly important with regards to control of stoichiometry, although there are co-ligand effects; (ii) structures of the metal alkyl derivatives [ZrLn(CH2R)(4-n)] are dominated by aromatic pi-pi stacking, even when bulky arene substituents are employed at L. This leads to the complexes adopting a C-2v-symmetric core; (iii) the amides [ZrL2(NMe2)(2)] have structures for which aromatic pi-pi stacking is unfeasible, and correspondingly C-2-symmetric or similar structures are adopted. All the structural data presented is consistent with a trans influence order at zirconium Me2N > RCH2 > py.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry|
|Journal or Publication Title:||DALTON TRANSACTIONS|
|Publisher:||ROYAL SOC CHEMISTRY|
|Number of Pages:||10|
|Page Range:||pp. 2257-2266|
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