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Diastereoselective assembly of pentanuclear circular helicates

Research output: Contribution to journalJournal article

Published
  • Oliver R. Clegg
  • Rebecca V. Fennessy
  • Lindsay P. Harding
  • Craig. R. Rice
  • T. Riis-Johannessen
  • Nicholas C. Fletcher
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<mark>Journal publication date</mark>7/12/2011
<mark>Journal</mark>Dalton Transactions
Issue number45
Volume40
Number of pages7
Pages (from-to)12381-12387
Publication statusPublished
Original languageEnglish

Abstract

Reaction of a ligand which contains two N-donor and O-donor tridentate domains separated by a 1,3-phenylene spacer unit with Zn2+ ions results in a pentanuclear circular helicate [Zn-5(L)(5)](10+) and this structure persists in both the solid and solution state. The formation of this high nuclearity species is governed by unfavourable steric interactions between the phenyl units which destabilize the simple linear helicate. Incorporation of enantiopure units within the ligand strand controls the diastereoselectivity with up to 80% d.e.