[Ni(cyclam)(OCOR)2]: a finite molecular complex; hydrogen-bonded supramolecular aggregation in one, two and three dimensions; and coordination polymers in one and two dimensions

In the complexes [Ni(cyclam)(OCOR)(2)] (cyclam = 1,4,8, 11-tetraazacyclotetradecane), where (RCOO)(-) is 2-naphthoate [bis-(2-naphthoato)-1,4,8,11-tetraazacyclotetradecanenickel(II), (I), monoclinic P2(1)/c, Z' = 0.5], 3,5-dinitrobenzoate [bis-(3,5-dinitrobenzoato)-1,4,8,11-tetraazacyclotetradecane- nickel(II), (II), triclinic P (1) over bar, Z' = 0.5], 4-nitrobenzoate [bis(4-nitrobenzoato)-1,4,8,11-tetraazacyclotetradecanenickel(II), (III), monoclinic P2(1)/n, Z' = 0.5], 3-hydroxybenzoate [bis(3-hydroxybenzoato)-1,4,8,11-tetraazacyclotetradecanenickel(II), (IV), monoclinic P2(1)/c, Z' = 0.5] and 4-aminobenzoate [bis-(4-aminobenzoato)-1,4,8,11-tetraazacyclotetradecanenickel(II), (V), monoclinic C2/c, Z' = 0.5], the Ni lies on a centre of inversion with monodentate carboxylato ligands occupying trans sites. Compound (I) consists of isolated molecules. In (II) and (III), N-H...O hydrogen bonds link the complexes into chains. Compounds (IV) and (III) form two- and three-dimensional structures generated entirely by hard hydrogen bonds. The 5-hydroxyisophthalate(2-) anion forms a hydrated complex, [Ni(cyclam)(5-hydroxyisophthalate)(H2O)].4H(2)O {[aqua-(5-hydroxyisophthalato)-1,4,8,11-tetraazacyclotetradecanenickel(II)] tetrahydrate, (VI), monoclinic Cc, Z' = 1}, in which the monodentate carboxylato ligand and a water molecule occupy trans sites at Ni: extensive hydrogen bonding links the molecular aggregates into a three-dimensional framework. The terephthalate(2-) anion forms a hydrated linear coordination polymer {catena-poly[terephthalato-1,4,8,11-tetraazacyclotetradecanenickel(II)] monohydrate, (VII), monoclinic C2/c, Z' = 0.5}. In 1,2,4,5-benzenecarboxylate tris[1,4,8,11-tetraazacyclotetradecanenickel(II)] diperchlorate hydrate (VIII), [Ni(cyclam)](3).[1,2,4,5-benzenetetracarboxylate(4-)].[ClO4](2).- [H2O](3), there are two distinct Ni sites: [Ni(cyclam)](2+) and centrosymmetric [C10H2O8](4-) units form a two-dimensional coordination polymer, whose sheets are linked by centrosymmetric [Ni(cyclam)(H2O)(2)](2+) cations.