title: Molecular Pac-Man and Tacos: layered Cu(II) cages from ligands with high binding site concentrations.
abstract: The in situ formation and subsequent Cu(ii) ligation of the polydentate pro-ligands o-[(E)-(2-hydroxy-3-methoxyphenyl)methylideneamino]benzohydroxamic acid (L1H3), o-[(E)-(2-hydroxy-3-methoxy-5-bromophenyl)methylideneamino]benzohydroxamic acid (L2H3) and o-[(E)-(2-hydroxyphenyl)methylideneamino]benzohydroxamic acid (L3H3), leads to the self-assembly of the cages [Cu(ii)10(L1)4(2-aph)2(H2O)2](ClO4)4·5MeOH (), [Cu(ii)14(L1)8(MeOH)2.5(H2O)7.5](NO3)4·3MeOH·7H2O (), [Cu(ii)14(L2)8(MeOH)4(H2O)6](NO3)4·6H2O (), [Cu(ii)14(L3)8(MeOH)6(H2O)2](NO3)4·4MeOH·8H2O () and [Cu(ii)30O(OH)4(OMe)2(L1)16(MeOH)4(H2O)2](ClO4)4·2MeOH·30H2O (). Each member comprises a highly unusual topology derived from off-set, stacked, near planar layers of polynuclear subunits connected through long Cu(ii)-O contacts. The exact topology observed is dependent on the specific reaction conditions and methodologies employed. Dc magnetic susceptibility studies on , , and reveals strong antiferromagnetic exchange between the Cu(ii) centres in all siblings. We also present the 1D coordination polymer {[Cu(ii)(L4)]·H2O}n () comprising the pseudo macrocyclic ligand [[2-[(E)-(2-hydroxy-3-methoxy-phenyl)methyleneamino]benzoyl]amino]ethanimidate (L4H2), which is formed upon the incorporation of an MeCN unit at the hydroxamate group of precursor ligand L1H3.
authors.affiliation: School of Chemistry, NUI Galway, University Road, Galway, Ireland.
authors.forename: Cecelia
authors.initials: C
authors.lastname: McDonald
authors.forename: David W
authors.initials: DW
authors.lastname: Williams
authors.forename: Priyanka
authors.initials: P
authors.lastname: Comar
authors.forename: Simon J
authors.initials: SJ
authors.lastname: Coles
authors.forename: Tony D
authors.initials: TD
authors.lastname: Keene
authors.forename: Mateusz B
authors.initials: MB
authors.lastname: Pitak
authors.forename: Euan K
authors.initials: EK
authors.lastname: Brechin
authors.forename: Leigh F
authors.initials: LF
authors.lastname: Jones