title: Linking [M(III)3] triangles with "double-headed" phenolic oximes.
abstract: Strapping two salicylaldoxime units together with aliphatic α,Ω-aminomethyl links in the 3-position gives ligands which allow the assembly of the polynuclear complexes [Fe(7)O(2)(OH)(6)(H(2)L1)(3)(py)(6)](BF(4))(5)·6H(2)O·14MeOH (1·6H(2)O·14MeOH), [Fe(6)O(OH)(7)(H(2)L2)(3)](BF(4))(3)·4H(2)O·9MeOH (2·4H(2)O·9MeOH) and [Mn(6)O(2)(OH)(2)(H(2)L1)(3)(py)(4)(MeCN)(2)](BF(4))(5)(NO(3))·3MeCN·H(2)O·5py (3·3MeCN·H(2)O·5py). In each case the metallic skeleton of the cluster is based on a trigonal prism in which two [M(III)(3)O] triangles are tethered together via three helically twisted double-headed oximes. The latter are present as H(2)L(2-) in which the oximic and phenolic O-atoms are deprotonated and the amino N-atoms protonated, with the oxime moieties bridging across the edges of the metal triangles. Both the identity of the metal ion and the length of the straps connecting the salicylaldoxime units have a major impact on the nuclearity and topology of the resultant cluster, with, perhaps counter-intuitively, the longer straps producing the "smallest" molecules.
authors.affiliation: EaStCHEM School of Chemistry, The University of Edinburgh, West Mains Road, Edinburgh, EH9 3JJ, UK.
authors.forename: Kevin
authors.initials: K
authors.lastname: Mason
authors.forename: John
authors.initials: J
authors.lastname: Chang
authors.forename: Alessandro
authors.initials: A
authors.lastname: Prescimone
authors.forename: Elena
authors.initials: E
authors.lastname: Garlatti
authors.forename: Stefano
authors.initials: S
authors.lastname: Carretta
authors.forename: Peter A
authors.initials: PA
authors.lastname: Tasker
authors.forename: Euan K
authors.initials: EK
authors.lastname: Brechin
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D019281:Dimerization; D008280:Magnetics; D008670:Metals / Q000737:chemistry*; D008968:Molecular Conformation; D010091:Oximes / Q000737:chemistry*; D013696:Temperature
chemical_list: D056831:Coordination Complexes; D008670:Metals; D010091:Oximes; C005704:salicylaldoxime