title: A one-dimensional coordination polymer based on a di-Schiff base supported trinuclear CuII subunit.
abstract: A novel one-dimensional Cu(II) coordination polymer, catena-poly[bis(μ(4)-3-{[2-(3-hydroxy-2-oxidobenzylidene)hydrazinylidene]methyl}benzene-1,2-diolato)dimethanoltricopper(II)], [Cu(3)(C(14)H(10)N(2)O(4))(2)(CH(3)OH)(2)](n), (I), was constructed with a di-Schiff base supported centrosymmetric trinuclear Cu(II) subunit. In the subunit, two peripheral symmetry-related Cu(II) cations have square-pyramidal CuNO(4) geometry and the central third Cu(II) cation lies on an inversion centre with octahedral CuN(2)O(4) geometry. In (I), each partially deprotonated di-Schiff base 3-{[2-(3-hydroxy-2-oxidobenzylidene)hydrazinylidene]methyl}benzene-1,2-diolate ligand (Hbcaz(3-)) acts as a heptadentate ligand to bind the Cu(II) centres into chains along the a axis. A centrosymmetric Cu(2)O(2) unit containing an asymmetrically bridging O atom, being axial at one Cu atom and equatorial at the other Cu atom, links the trinuclear Cu(II) subunit into a one-dimensional chain, which is reinforced by intramolecular phenol-methanol O-H...O and methanol-phenolate O-H...O hydrogen bonds. Interchain π-π stacking interactions between pyrocatechol units, with a distance of 3.5251 (18) Å, contribute to the stability of the crystal packing.
authors.affiliation: Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, People's Republic of China.
authors.forename: Liangliang
authors.initials: L
authors.lastname: Zhang
authors.forename: Fuling
authors.initials: F
authors.lastname: Liu
authors.forename: Shuai
authors.initials: S
authors.lastname: Yuan
authors.forename: Xiaoyang
authors.initials: X
authors.lastname: Wang
authors.forename: Di
authors.initials: D
authors.lastname: Sun
mesh_terms: D003300:Copper / Q000737:chemistry*; D006860:Hydrogen Bonding; D008958:Models, Molecular; D011108:Polymers / Q000737:chemistry*; D012545:Schiff Bases / Q000737:chemistry
chemical_list: D011108:Polymers; D012545:Schiff Bases; D003300:Copper