Coordination cages of rhodium and iridium as exoreceptors for alkali metal ions.

Coordination cages of rhodium and iridium as exoreceptors for alkali metal ions. Research Abstract Details 

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Coordination cages of rhodium and iridium as exoreceptors for alkali metal ions. Abstract Text:

Hexanuclear coordination cages of the formula [(C 5Me 4R)M(C 7H 3NO 4)] 6 (M = Rh, Ir; R = Me, H) were obtained by stepwise reaction of [(C 5Me 4R)MCl 2] 2 with, first, AgOAc and, then, pyridine-3,5-dicarboxylic acid. Crystallographic analyses show that the cages adopt a distorted octahedral geometry with the pyridine-3,5-dicarboxylates functioning as dianionic, bridging ligands, each of which connects three different (C 5Me 4R)M fragments. The cages act as exoreceptors for the large alkali metal ions K (+) and Cs (+) but show low affinity for Na (+). Crystallographic and NMR spectroscopic analyses indicate that two metal ions can be coordinated to the surface of the cages. The respective binding sites comprise three carbonyl O-atoms from the bridging pyridine-3,5-dicarboxylate ligand.

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Coordination cages of rhodium and iridium as exoreceptors for alkali metal ions. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Inorganic chemistry

VOLUME: 47

Page Numbers: 6375-81

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ISSN: 1520-510X

DAY: 20

MONTH: 06

YEAR: 2008

Coordination cages of rhodium and iridium as exoreceptors for alkali metal ions. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Coordination cages of rhodium and iridium as exoreceptors for alkali metal ions.

AFFILIATION: kay.severin@epfl.ch.

Country: United States

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MEDLINETA: Inorg Chem

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