title: Nature of the reactants and influence of water on the supramolecular assembly.
abstract: The influences of the nature of reactants and water on the self-assembly of cationic Cu(II) complex structures containing N-(2-pyridylmethyl)glycine (Hpgly) and N-(2-pyridylmethyl)-l-alanine (Hpala) ligands have been investigated. A metallamacrocycle [Cu(6)(pgly)(3)(spgly)(3)] (ClO(4))(6).9H(2)O has been formed by the reaction of [Cu(pgly)(2)].2H(2)O with Cu(ClO(4))(2).6H(2)O. The hexameric cation has Schiff base and reduced Schiff base ligands alternatively bonded to Cu(II) to provide cyclohexane-like conformation with a cavity diameter of 9.4 A. The reaction of Cu(ClO(4))(2).6H(2)O with Hpgly.HCl yielded [Cu(pgly)(H(2)O)](ClO(4)), which is presumed to have 1D coordination polymeric structure. A [K subset [12-MC-3]] metallacrown, [K(ClO(4))(3)[Cu(3)(pala)(3)]](ClO(4)) has been isolated by reacting Cu(ClO(4))(2) with Kpala in MeCN/MeOH. This [K subset [12-MC-3]] metallacrown further reacts with water to form an infinite 1D coordination polymer [Cu(pala)(H(2)O)(ClO(4))](n)(), which can also be obtained by conducting the reaction in aqueous MeOH.
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543.
authors.forename: Xiaobai
authors.initials: X
authors.lastname: Wang
authors.forename: Jagadese J
authors.initials: JJ
authors.lastname: Vittal
mesh_terms: D000409:Alanine / Q000031:analogs & derivatives / Q000737:chemistry*; D018360:Crystallography, X-Ray; D003510:Cyclohexanes / Q000737:chemistry; D005998:Glycine / Q000031:analogs & derivatives / Q000737:chemistry*; D007202:Indicators and Reagents; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D012545:Schiff Bases; D014867:Water / Q000737:chemistry*
chemical_list: C482212:(potassium perchlorate(tris(N-(2-pyridylmethyl)alanine)tricopper(II))); D003510:Cyclohexanes; D007202:Indicators and Reagents; D008024:Ligands; C482213:N-(2-pyridylmethyl)alanine; C121909:N-(2-pyridylmethyl)glycine; D009942:Organometallic Compounds; D011725:Pyridines; D012545:Schiff Bases; D014867:Water; D000409:Alanine; D005998:Glycine