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Quaterpyridine Ligands Forming Helical Complexes of Mono‐ and Dinuclear (Helicate) Forms
Author(s) -
Stefankiewicz Artur R.,
Wałęsa Monika,
Jankowski Piotr,
Ciesielski Artur,
Patroniak Violetta,
Kubicki Maciej,
Hnatejko Zbigniew,
Harrowfield Jack M.,
Lehn JeanMarie
Publication year - 2008
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200800172
Subject(s) - chemistry , ligand (biochemistry) , octahedron , stereochemistry , crystal structure , crystallography , coordination complex , metal , receptor , organic chemistry , biochemistry
The dimethylquaterpyridine ligand L1 reacts with Cu I and Ag I to give dinuclear complexes of “helicate” form, in which the metals are in an approximate tetrahedral coordination, whereas reactions with Co II and Zn II provide mononuclear complexes, in which the metals are apparently six‐coordinate with markedly distorted octahedral coordination, and the ligand retains a helical conformation. Oxidation of the methyl substituents of L1 into carboxylic acid groups, followed by esterification, gives ligand L2 , which also forms a dinuclear Cu I helicate and a mononuclear Co II complex; one of the ester groups appears to be involved in complexation in the latter. All the complexes were characterised by single‐crystal X‐ray structure determinations.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)