title: A windmill-shaped hexacopper(II) molecule built up by template core-controlled expansion of diaquatetrakis(mu2-adeninato-N3,N9)dicopper(II) with aqua(oxydiacetato)copper(II).
abstract: The windmill-shaped hexanuclear copper(II) cluster {(H(2)O)(2)Cu(2)(mu(3)-(Ade)(4)[Cu(oda)(H(2)O)](4)}.6H(2)O (1-o) has been synthesized in aqueous medium by in situ core-controlled expansion of the neutral building block Cu(2)(mu(2)-N3,N9-Ade)(4)(H(2)O)(2) (2) with Cu(oda)(H(2)O) (3-o) (Ade = adeninato(1-) and oda = oxydiacetato(2-) ligands). Crystal data for 2-b (2.5H(2)O): triclinic, space group P(-)1; a = 9.374(1), b = 9.440(1), c = 10.326(1) A; alpha = 78.72(1), beta = 76.77(1), gamma = 63.51(1) degrees ; final R(1) = 0.059; T = 100(2) K. Crystal data for 1-o: monoclinic, space group P2(1)/n; a = 15.203(2), b = 10.245(1), c = 19.094(2) A; beta = 101.61(1) degrees ; final R(1) = 0.049; T = 293(2) K. The X-shaped hexanuclear molecule consists of a central core (2) and four terminal arms (3-o) linked together by bridging mu(3)-N3,N7,N9-Ade ligands. There are three crystallographic independent metal atoms (two terminals, one central). All Cu(II) atoms exhibit a 4 + 1 coordination, of which one is an aqua apical ligand. The basal coordination sets complete the CuN(4) + O or CuO(3)N + O chromophores for the central or terminal metal atoms, respectively. Thermal stability and spectral and magnetic properties were also studied. Analogous compounds to 1-o with tridentate or tripodal tetradentate ligands L(2-), instead of oda, have also been synthesized.
authors.affiliation: Department of Inorganic Chemistry, Faculty of Pharmacy, University of Granada, E-18071 Granada, Spain. jmgp@ugr.es
authors.forename: Josefa María
authors.initials: JM
authors.lastname: González-Pérez
authors.forename: Carolina
authors.initials: C
authors.lastname: Alarcón-Payer
authors.forename: Alfonso
authors.initials: A
authors.lastname: Castiñeiras
authors.forename: Tiziana
authors.initials: T
authors.lastname: Pivetta
authors.forename: Luis
authors.initials: L
authors.lastname: Lezama
authors.forename: Duane
authors.initials: D
authors.lastname: Choquesillo-Lazarte
authors.forename: Guido
authors.initials: G
authors.lastname: Crisponi
authors.forename: Juan
authors.initials: J
authors.lastname: Niclós-Gutiérrez
mesh_terms: D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008280:Magnetics; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D013696:Temperature
chemical_list: D009942:Organometallic Compounds; C511465:aqua(oxydiacetato)copper(II); C511464:diaquatetrakis(mu2-adeninato-N3,N9)dicopper(II); D003300:Copper