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Stereoselective coordination chemistry of the tetradentate chelating ligand (2R,3R )-bis(2,2′-dipyridyl-5-methoxyl)butane

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published
<mark>Journal publication date</mark>21/06/2003
<mark>Journal</mark>Dalton Transactions
Issue number12
Volume2003
Number of pages6
Pages (from-to)2558-2563
Publication StatusPublished
<mark>Original language</mark>English

Abstract

The enantiomerically pure ligand L3RR (2R,3R)-bis(2,2′-dipyridyl-5-methoxyl)butane has been synthesised by linking two 2,2′-bipyridine units with (2R,3R)-butandiol. The reaction of L3RR with Zn(II) afforded a mononuclear species and the 1H NMR spectroscopy points to a C1 symmetry, expected for a distorted trigonal bipyramidal coordination environment. These observations were confirmed by MM2 calculations and electrospray mass spectrometry. The reaction of L3RR with iron(II) indicated the formation of a dinuclear species by mass spectrometry. Solution state CD spectroscopy indicates that both complexes adopt a A-configuration, implying a single stranded dinuclear iron(II) complex is present rather than the anticipated triple helical architecture.