Anion and cation binding by a pendant arm cyclam and its macrobicyclic derivatives

Dalton Transactions Pub Date: 2005-06-10 DOI: 10.1039/B504561D

Abstract

A series of transition-metal complexes of N,N′,N″,N?-tetra(3-hydroxypropyl)cyclam (L1) are reported. The X-ray structures of the compounds reveal pendant arm coordination of one of the alcohol groups to give square-pyramidal metal centres with simultaneous hydrogen bonding to the counter anions. Ligand L1 has been elaborated to form a series of macrotricyclic derivatives that form 1 ∶ 1 complexes with Cu(II) and Ni(II). The X-ray structure of the tetrahydrate and protonated forms of L1 are also reported.

Graphical abstract: Anion and cation binding by a pendant arm cyclam and its macrobicyclic derivatives
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