Polyhedron

Synthesis, magnetic properties and theoretical calculations of novel nitronyl nitroxide and imino nitroxide diradicals grafted on terpyridine moiety

…, A Ivanova, V Enkelmann, A Geies, M Baumgarten

Index: Zoppellaro, Giorgio; Ivanova, Anela; Enkelmann, Volker; Geies, Ahmed; Baumgarten, Martin Polyhedron, 2003 , vol. 22, # 14-17 p. 2099 - 2110

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Citation Number: 39

Abstract

The synthetic route based on Stille coupling between tributyltinpyridyl derivatives and bromo substituted mono-and dipyridyl-carbaldehyde is used for the synthesis of 5, 5 ″-diformyl-2, 2′: 6′, 2 ″-terpyridine (8). A sequence of Ullman coupling with 2, 3-bis (hydroxylamino)- 2, 3-dimethylbutane followed by oxidation under phase transfer conditions affords either 5, 5 ″-Bis (1-oxyl-3-oxo-4, 4, 5, 5-tetramethylimidazolidin-2-yl) 2, 2′: 6′, 2 ″-terpyridine (10 ...