Construction of coordination polymers of cadmium(II) with mixed hexamethylenetetramine and terephthalate or thiocyanate ligands
TL;DR: In this paper, three new polymeric complexes [Cd(hmt)(SCN)(2)(H2O)(2)](n) (1), [cd-3(mu(2)-hmt(2)(scN)(6)(H 2O)(6) (n) n) (2), and [ cd-2(Hmt)(2)tP)(2), [hmt = hexamethylenetetetramine, tp = terephthalate] have been synthesized and characterized by single crystal
About: This article is published in Polyhedron.The article was published on 2003-09-15. It has received 48 citations till now. The article focuses on the topics: Thiocyanate & Denticity.
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TL;DR: In this paper, the main structural and topological types of coordination polymers bearing hexamethylenetetramine (hmt) are summarized, showing that a diversity of metal-organic networks can be generated by facile self-assembly routes in aqueous medium and using rather simple chemicals.
153 citations
TL;DR: In this article, two new cadmium-II-terephthalate complexes were synthesized by a conventional solution method, which are composed of 1-D polymeric zig-zag chains with distorted pentagonal-bipyramidal Cadmium centers.
53 citations
TL;DR: In this paper, three μ1,5-dicyanamide bridged Mn(II) and Co(II)-complexes have been synthesized and characterized by single crystal X-ray diffraction study, low temperature (300-2,K) magnetic measurement and thermal behavior.
44 citations
TL;DR: The luminescent properties of the title complex in the solid state were investigated and a novel Cd(II) coordination polymer with hexagonal metallocyclic rings was synthesized and characterized.
42 citations
TL;DR: In this paper, four new cadmium(II) complexes with hexamine (hmt) and monocarboxylate ions, benzoate (bz), phenylacetate (pa), or acetate (ac), were synthesized and characterized structurally.
Abstract: Four new cadmium(II) complexes [Cd2(bz)4(H2O)4(μ2-hmt)]·Hbz·H2O (1), [Cd3(bz)6(H2O)6(μ2-hmt)2]·6H2O (2), [Cd(pa)2(H2O)(μ2-hmt)]n (3), and {[Cd3(ac)6(H2O)3(μ3-hmt)2]·6H2O}n (4) with hexamine (hmt) and monocarboxylate ions, benzoate (bz), phenylacetate (pa), or acetate (ac) have been synthesized and characterized structurally. Structure determinations reveal that 1 is dinuclear, 2 is trinuclear, 3 is a one-dimensional (1D) infinite chain, and 4 is a two-dimensional (2D) polymer with fused hexagonal rings consisting of CdII and hmt. All the CdII atoms in the four complexes (except one CdII in 2) possess seven-coordinate pentagonal bipyramidal geometry with the various chelating bidentate carboxylate groups in equatorial sites. One of the CdII ions in 2, a complex that contains two monodentate carboxylates is in a distorted octahedral environment. The bridging mode of hmt is μ2- in complexes 1−3 but is μ3- in complex 4. In all complexes, there are significant numbers of H-bonds, C−H/π, and π−π interactions wh...
41 citations
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TL;DR: In this article, three new polymeric complexes [Cd(2-Acpy)(N3)2]n1, [cd(4-acpy)2 n3]n2 and [Ccd3 nbrpy)4 n3 6]n3 have been synthesized and characterized by single crystal X-ray diffraction, and the coordination environment of the cadmium atom is distorted octahedral with two-dimensional polynuclear layers.
Abstract: Three new polymeric complexes [Cd(2-Acpy)(N3)2]n1, [Cd(4-Acpy)2(N3)2]n2 and [Cd3(4-Brpy)4(N3)6]n3 (2-Acpy = 2-acetylpyridine, 4-Acpy = 4-acetylpyridine, and 4-Brpy = 4-bromopyridine) have been synthesized and characterized by single crystal X-ray diffraction. The coordination environment of the cadmium atom in all the complexes is distorted octahedral with two-dimensional polynuclear layers. The cadmium atoms are linked by both μ-1,1 and μ-1,3 in 1, by only μ-1,3 in 2 and by μ-1,1 and μ-1,1,3 azide bridges in 3 giving different cadmium(II)–azide
topologies.
51 citations
TL;DR: In this paper, two nitrate compounds were obtained from the reactions of different metal salts and 4,4′-bpy, and they were made up of two-dimensional square [M4(4,4, 4′)-bpy)4] grids in which the cavity has dimensions of 11.01×11.02 and 11.69 × 11.81 A, respectively.
49 citations
TL;DR: In this article, the tertiary carbon atom of one of the isopropyl groups of the ligand is catalyzed by the copper enzyme dopamine β-monooxygenase.
Abstract: Low-temperature oxygenation of {Cu[P(imiPr2)3]CH3CN}CF3SO3 affords a μ-η2:η2-peroxo adduct. Upon warming a dilute solution (<10-3 M) of the peroxide complex, intramolecular hydroxylation occurs at the tertiary carbon atom of one of the isopropyl groups of the ligand, reminiscent of the one catalyzed by the copper enzyme dopamine β-monooxygenase.
43 citations
TL;DR: The symmetrical anion of β-glutamic acid [β-GluH2] has been introduced into crystal engineering of metal complexes for the first time as mentioned in this paper, and the symmetric anion has been used for the neutralization of aqueous solutions with zinc oxide or lithium hydroxide.
Abstract: The symmetrical anion [β-GluH]− of β-glutamic acid [β-GluH2] has been introduced into crystal engineering of metal complexes for the first time. Neutralization of aqueous solutions of β-glutamic acid with zinc oxide or lithium hydroxide affords crystalline samples of zinc bis(hydrogen-β-glutamate) trihydrate and lithium hydrogen-β-glutamate hydrate, respectively. [Zn(β-GluH)2(H2O)3] has a layer structure with corrugated sheets featuring a square-grid pattern of the tetra-coordinated zinc dications and bridging [O2C–CH2CH(NH3)CH2–CO2]− anions (in their gauche-conformation). The uniform meshes of the network are based on puckered 32-membered rings. Neighbouring undulated layers are mutually shifted into a space-filling indentation which also generates a network of hydrogen bonds involving the
ammonio and carboxylate groups and the intercalated water molecules. [Li(β-GluH)(H2O)] has a less corrugated layer structure based on a parallelogram-grid of lithium cations which are connected by three bridging [β-GluH]− anions (in their anti-conformation). The water molecule is part of the tetrahedral coordination sphere of the metal atom. The layers represent a mixed-mesh network with pores based on 8- and 32-membered rings. Neighbouring layers are mutually shifted to allow for extensive hydrogen bonding.
15 citations
9 citations