title: Two novel 3-D coordination polymers with 5-methoxyisophthalate and flexible N-donor co-ligands showing pentanuclear or alternate mono/binuclear Cu(II) units.
abstract: Two novel 3-D coordination polymers with different Cu(II) subunits as nodes and mixed bridging ligands as linkers, namely [Cu(5)(μ(3)-OH)(2)(1,3-bip)(2)(CH(3)O-ip)(4)](n) (1) and {[Cu(4)(1,3-btp)(2)(CH(3)O-p)(4)(H(2)O)(2)]·2H(2)O}(n) (2) (CH(3)O-H(2)ip = 5-methoxyisophthalate, 1,3-bip = 1,3-bis(imidazol)propane, 1,3-btp = 1,3-bis(1,2,4-triazol-1-yl)propane), were prepared under hydrothermal conditions. Complex 1 exhibits a CsCl-type network with [Cu(5)(μ(3)-OH)(2)](8+) clusters acting as nodes, which represents the first 3-D network based on pentanuclear Cu(II) clusters. Complex 2 features a 3-D pillared-layer network with (4,6)-connected (4(4).6(2))(4(4).6(8).8(3))-fsc topology, which is a rare example of homometallic coordination polymers constructed by alternate binuclear metal clusters and single metal centres. Variable-temperature magnetic susceptibility measurements show dominant ferromagnetic interactions in the pentanuclear clusters of 1 and strong antiferromagnetic interactions in the dinuclear paddle-wheel units of 2.
authors.affiliation: College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471022, China.
authors.forename: Lu-Fang
authors.initials: LF
authors.lastname: Ma
authors.forename: Jun-Wei
authors.initials: JW
authors.lastname: Zhao
authors.forename: Min-Le
authors.initials: ML
authors.lastname: Han
authors.forename: Li-Ya
authors.initials: LY
authors.lastname: Wang
authors.forename: Miao
authors.initials: M
authors.lastname: Du
mesh_terms: D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008024:Ligands; D060328:Magnetic Phenomena; D008958:Models, Molecular; D008968:Molecular Conformation; D009584:Nitrogen / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*
chemical_list: D008024:Ligands; D009942:Organometallic Compounds; D011108:Polymers; C548936:copper(II)5-methoxyisophthalate; D003300:Copper; D009584:Nitrogen