Coordination features of bis (N-heterocyclic carbenes) and bis (oxazolines) with 1, 3-alkylidene-2, 4, 6-trimethylbenzene spacers. Synthesis of the ligands and silver …

…, C López, N Mesquida, G Muller, S Rodríguez

Index: Alcalde, Ermitas; Ceder, Rosa M.; Lopez, Cristina; Mesquida, Neus; Muller, Guillermo; Rodriguez, Sandra Dalton Transactions, 2007 , # 25 p. 2696 - 2706

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Citation Number: 11

Abstract

The synthesis of simple imidazolium-based ligand precursors containing a 1, 3-alkylidene-2, 4, 6-trimethylbenzene spacer was examined and different synthetic protocols were applied depending on the nature of the alkylidene arm. For a methylene arm, simple dications 5a, b· 2Cl were obtained directly. The higher homologue counterparts were conveniently prepared by general multistep routes following a five-step sequence for ethylene dications 6a, b· ...