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Issue 6, 2015
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Synthesis and transition metal coordination chemistry of a novel hexadentate bispidine ligand

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Abstract

Reported is the new bispidine-derived hexadentate ligand L (L = 3-(2-methylpyridyl)-7-(bis-2-methylpyridyl)-3,7-diazabicyclo[3.3.1]nonane) with two tertiary amine and four pyridine donor groups. This ligand can form heterodinuclear and mononuclear complexes and, in the mononuclear compounds discussed here, the ligand may coordinate as a pentadentate ligand, with one of the bispyridinemethane-based pyridine groups un- or semi-coordinated, or as a hexadentate ligand, leading to a pentagonal pyramidal coordination geometry or, with an additional monodentate ligand, to a heptacoordinate pentagonal bipyramidal structure. The solution and solid state data presented here indicate that, with the relatively small CuII and high-spin FeII ions the fourth pyridine group is only semi-coordinated for steric reasons and, with the larger high-spin MnII ion genuine heptacoordination is observed but with a relatively large distortion in the pentagonal equatorial plane.

Graphical abstract: Synthesis and transition metal coordination chemistry of a novel hexadentate bispidine ligand

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Supplementary files

Article information


Submitted
22 Oct 2014
Accepted
14 Nov 2014
First published
14 Nov 2014

Dalton Trans., 2015,44, 2724-2736
Article type
Paper
Author version available

Synthesis and transition metal coordination chemistry of a novel hexadentate bispidine ligand

P. Comba, H. Rudolf and H. Wadepohl, Dalton Trans., 2015, 44, 2724
DOI: 10.1039/C4DT03262D

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