Abstract
The [2+2] cyclocondensation reaction between sodium 2,6-diformyl-4-chlorophenolate and benzyldiethylenetriamine using the sodium template method, followed by transmetallation with Hg(CH3COO)2·2H2O, gave an unexpected 18-membered macrocyclic product in which ring contractions have occurred to produce two imidazolidine rings. In the dinuclear macrocyclic complex, bis[μ-3,17-dibenzyl-3,6,9,17,20,23-hexaazatetracyclo[23.3.1.111,15.02,6.016,20]tricosa-1(29),9,11,13,15(30),23,25,27-octaene-29,30diolato]bis[diacetatomercury(II)] tetrahydrate diethanol solvate, [Hg2(C38H38Cl2N6O2)(CH3COO)4]·4H2O·2CH3CH2OH, each HgII ion is coordinated by the imine N atom and O atom of the macrocyclic ligand and four O atoms from the acetate ligands, to form a centrosymmetric structure. The Hg coordination is irregular and it may be described as a distorted square pyramid.
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