Template synthesis of a bimetallic complex of a 30-membered decadentate macrocyclic ligand: the crystal and molecular structure of a lead(II) complex

Abstract

The product of reaction of 2,6-diacetylpyridine with 3,6-dioxaoctane-1,8-diamine in the presence of Pb(SCN)₂ contains two seven-co-ordinate lead(II) ions in a 30-membered, decadentate ‘N₆O₄’ macrocyclic ligand; in contrast, analogous reactions involving 3,6-diazaoctane-1,8-diamine or 4,7-diazadecane-1,10-diamine yield complexes of the 15- and 17-membered quinquedentate ‘N₅’ macrocycles.