title: A novel zinc(II) complex with the ligand 2,2',2''-(1,4,7-triazanonane-1,4,7-triyl)triacetate (NOTA).
abstract: The zinc(II) complex with NOTA [2,2',2''-(1,4,7-triazanonane-1,4,7-triyl)triacetate] has previously been synthesized and studied in solution, but was not isolated. The corresponding title Zn(II) complex penta-sodium(I) bis-{[2,2',2''-(1,4,7-triazanonane-1,4,7-triyl)triacetato]zinc(II)} tris-(perchlorate) methanol solvate, Na(5)[Zn(C(12)H(18)N(3)O(6))](2)(ClO(4))(3)·CH(3)OH, was crystallized as a sodium perchlorate double salt in methano-l solution. The asymmetric unit contains two independent [Zn(NOTA)](-) complex anion entities, five sodium cations, three perchlorate anions and a methanol solvent mol-ecule. The two Zn(II) cations exhibit a distorted trigonal-prismatic N(3)O(3) coordination with a bifacial arrangement of the donor atoms. Neither the methanol solvent mol-ecule nor the perchlorate anions appear to be coordinated to the Zn centres. The crystal structure shows a layer arrangement parallel to (001) generated by inter-actions between the [Zn(NOTA)](-) units, the Na(+) cations, two ClO(4) (-) units and the methanole mol-ecule, leading to an overall layer composition of [Na(5)[Zn(C(12)H(18)N(3)O(6))](2)(ClO(4))(2) (.)CH(3)OH](+). The third ClO(4) anion is isolated and situated between the layers without any significant inter-actions.
authors.affiliation: Departamento de Química Inorgánica, Facultade de Química, Avd. das Ciencias s/n, Universidade de Santiago de Compostela, 15706-Santiago de Compostela, A Coruña, Galicia, Spain.
authors.forename: Iria
authors.initials: I
authors.lastname: Pereira-García
authors.forename: Alejandro
authors.initials: A
authors.lastname: Macías
authors.forename: Rufina
authors.initials: R
authors.lastname: Bastida
authors.forename: Laura
authors.initials: L
authors.lastname: Valencia