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Dalton Trans. 2007 May 14;(18):1762-72. doi: 10.1039/b617907j. Epub 2007 Mar 20.

N-methylation of macrobicycles reduces encapsulation ability.

Dalton transactions (Cambridge, England : 2003)

Sofia Derossi, David T Farrell, Charles J Harding, Vickie McKee, Jane Nelson

Affiliations

  1. Chemistry Department, Loughborough University, Loughborough, UKLE11 3TU.

PMID: 17471371 DOI: 10.1039/b617907j

Abstract

N-methylation alters the conformation of octa-azacryptands leaving them unable to use all potential N-donors to coordinate copper(II) and anionic guests. This restriction, in the presence of other donors, normally results in exogenous coordination, with the exception of carbonate complexes, where two O-donors from the bridging anion along with three N-donors from the cryptand serve, in this series uniquely, to retain a pair of copper(II) ions within the "basket-shaped" cavity.

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