title: Self-assembly of a 1D hydrogen-bonded polymer from a hexamethyltetraaza macrocyclic nickel(II) complex and isophthalic acid.
abstract: The compound [Ni(L)(isoph)₂][Ni(L)]·8H₂O (1; L = C-meso-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane; H₂-isoph = isophthalic acid) has been synthesized and structurally characterized. Complex 1 exhibits a geometrically symmetric core with a {4/6} coordination number set. The coordination environment around the Ni(1) ion is a distorted octahedron, while the geometry around the four-coordinate Ni(2) is depicted as square planar in 1D hydrogen-bonded infinite chain. The compound crystallizes in the triclinic system P-1 with a = 8.602(2), b = 10.684(7), c = 16.550(3) Å, a = 91.04(4), b = 94.09(2), g = 111.09(4)°, V = 1413.9(10) Å³, Z = 1. The cyclic voltammogram of 1 undergoes one-electron wave corresponding to NiII/NiI process. The electronic spectra, electrochemical and TGA behavior of the complex are significantly affected by the nature of the hexamethyltetraaza macrocycle and the axial isoph²⁻ ligand.
authors.affiliation: Department of Chemistry Education, Kongju National University, Kongju 314-701, Korea.
authors.forename: In-Taek
authors.initials: IT
authors.lastname: Lim
authors.forename: Ki-Young
authors.initials: KY
authors.lastname: Choi
mesh_terms: D006859:Hydrogen / Q000737:chemistry; D006860:Hydrogen Bonding; D008024:Ligands; D047028:Macrocyclic Compounds / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D009532:Nickel / Q000737:chemistry*; D010795:Phthalic Acids / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D013818:Thermogravimetry
chemical_list: D008024:Ligands; D047028:Macrocyclic Compounds; D010795:Phthalic Acids; D011108:Polymers; C059768:isophthalate; D009532:Nickel; D006859:Hydrogen