Bipy Ligands (bipy + ligand)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

Novel Cadmium(II) Adipate Coordination Polymers with Structural Transformation via Oxalate Ligand: Syntheses, Structures and Fluorescence Properties

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 20 2004
Na Hao
Abstract Two novel cadmium adipate coordination polymers [Cd{O2C(CH2)4CO2}{1,10-phen}]n (1) and [Cd2(C2O4){O2C(CH2)4CO2(OH2)2}{2,2,-bipy}]·H2O (2) [adipic acid = HO2C(CH2)4CO2H] have been hydrothermally synthesized and characterized by elemental analyses, IR spectroscopy, thermogravimetric analysis and single-crystal X-ray diffraction. Crystallographic data for 1: monoclinic, C2/c, a = 16.186(3) Å, b = 15.487(3) Å, c = 14.052(3) Å, , = 112.73(3)°, Z = 8. Crystal data for 2: monoclinic, Cc, a = 23.448(5) Å, b = 11.826(2) Å, c = 8.3163(17) Å, , = 99.08(3)°, Z = 4. The structural analysis reveals that 1 forms a novel one-dimensional chain in which the binuclear Cd centers are linked by adipate anions. Compound 2 is the first example in which both a 2,2,-bipy ligand and an oxalate group are found in the {M/adipate} system. Compound 2 possesses one-dimensional sine- or cosine-type chains, which are alternately connected together by the oxalate group to form a three-dimensional framework. The structural determination reveals that the introduction of the oxalate ligand causes the dimensional transformation of the compounds. Compounds 1 and 2 show strong fluorescent properties at room temperature. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004) [source]

Ammine(2,2,-bipyridine-,2N,N,)silver(I) nitrate: a dimer formed by ,,, stacking and ligand-unsupported Ag...Ag interactions

ACTA CRYSTALLOGRAPHICA SECTION C, Issue 3 2010
Di Sun
Reaction of AgNO3 and 2,2,-bipyridine (bipy) under ultrasonic treatment gave the title compound, [Ag(C10H8N2)(NH3)]NO3. The crystal structure consists of dimers formed by two symmetry-related AgI,bipy monomers connected through intra-dimer ,,, stacking and ligand-unsupported Ag...Ag interactions. A crystallographic C2 axis passes through the mid-point of and is perpendicular to the Ag...Agi(,x + 1, y, ,z + ) axis. In addition, each AgI cation is coordinated by one chelating bipy ligand and one ammine ligand, giving a trigonal coordination environment capped by the symmetry-equivalent Ag atom. Molecules are assembled by Ag...Ag, ,,,, hydrogen-bond (N,H...O and C,H...O) and weak Ag..., interactions into a three-dimensional framework. Comparing the products synthesized under different mechanical treatments, we found that reaction conditions have a significant influence on the resulting structures. The luminescence properties of the title compound are also discussed. [source]

Poly[[diaqua-,-4,4,-bipyridine-dinitratodi-,- l -tyrosinato-dicopper(II)]: a chiral two-dimensional coordination polymer

ACTA CRYSTALLOGRAPHICA SECTION C, Issue 1 2009
Shuo Zhang
The title compound, [Cu2(C9H10NO3)2(NO3)2(C10H8N2)(H2O)2]n, contains CuII atoms and l -tyrosinate (l -tyr) and 4,4,-bipyridine (4,4,-bipy) ligands in a 2:2:1 ratio. Each Cu atom is coordinated by one amino N atom and two carboxylate O atoms from two l -tyr ligands, one N atom from a 4,4,-bipy ligand, a monodentate nitrate ion and a water molecule in an elongated octahedral geometry. Adjacent Cu atoms are bridged by the bidentate carboxylate groups into a chain. These chains are further linked by the bridging 4,4,-bipy ligands, forming an undulated chiral two-dimensional sheet. O,H...O and N,H...O hydrogen bonds connect the sheets in the [100] direction. This study offers useful information for the engineering of chiral coordination polymers with amino acids and 4,4,-bipy ligands by considering the ratios of the metal ion and organic components. [source]

An unusual chain cadmium(II) coordination polymer: catena -poly[[(2,2,-bipyridyl-,2N,N,)cadmium(II)]-di-,-chlorido-[(2,2,-bipyridyl-,2N,N,)cadmium(II)]-di-,-thiocyanato-,2N:S;,2S:N]

ACTA CRYSTALLOGRAPHICA SECTION C, Issue 12 2007
Min Chen
The title complex, [CdCl(NCS)(C10H8N2)]n, represents an unusual CdII coordination polymer constructed by two types of anionic bridges and 2,2,-bipyridyl (bipy) terminal ligands. These two types of bridges are arranged around inversion centers. The distorted octahedral coordination of the CdII center is provided by two chloride ions, one N- and one S-donor atom from two thiocyanate ions, and a pair of N atoms from the chelating bipy ligand. Interestingly, adjacent CdII ions are interconnected alternately by paired chloride [Cd...Cd = 3.916,(1),Å] and thiocyanate bridges [Cd...Cd = 5.936,(1),Å] to generate an infinite one-dimensional coordination chain. Furthermore, weak interchain C,H...S interactions between the bipy components and thiocyanate ions lead to the formation of a layered supramolecular structure. [source]

Thermal Decomposition Reactions as a Tool for the Synthesis of New Thermodynamic Metastable Modifications: Synthesis, Structures, and Properties of (Formato)nickel(II) Coordination Polymers Based on 4,4,-Bipyridine

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 12 2010
Jan Boeckmann
Abstract The reaction of nickel formate with 4,4,-bipyridine (bipy) in aqueous solution at room temperature leads to the formation of the hydrated compound [Ni(HCO2)2(H2O)(bipy)·4H2O]n (1) reported recently. On heating, compound 1 decomposes into the new anhydrous compound of composition [Ni(HCO2)2(bipy)]n (2II), which decomposes on further heating. Interestingly, if the anhydrous compound is prepared from solution, a new modification 2I is obtained. Investigations on the stability of both forms show that modification 2I presents the thermodynamically most stable form between room and decomposition temperature, whereas modification 2II, which can only be prepared by thermal decomposition, is metastable. In the crystal structure of 2I, the Ni2+ cations are coordinated by four ,2 - anti,anti bridging formato anions and two bridging ,2 -bipy ligands in a slightly distorted octahedralgeometry. The formato anions bridge the metal cations in zigzag chains, which are further connected by ,2 - anti,anti formato anions and bipy ligands to give a three-dimensional coordination network. IR spectroscopic investigations on the metastable form 2II also indicate that all formato anions act as bridging ligands. Magnetic measurements of the hydrated and anhydrous compounds reveal different behavior with a ferromagnetic ordering for compound 2I and an antiferromagnetic ordering for compound 1. For form 2II, only Curie,Weiss paramagnetism was found. [source]

Poly[[[aqua(2,2,-bipyridine-,2N,N,)manganese(II)]-,-croconato-,4O,O,:O,,,O,,,] monohydrate]: a one-dimensional coordination polymer connected by hydrophilic,hydrophilic and lipophilic,lipophilic interactions at 135,K

ACTA CRYSTALLOGRAPHICA SECTION C, Issue 4 2010
Hong-Feng Chen
In the title one-dimensional coordination polymer, {[Mn(C5O5)(C10H8N2)(H2O)]·H2O}n, each MnII ion is seven-coordinated by four O atoms from two croconate ligands, two N atoms from a 2,2,-bipyridine (2,2,-bipy) ligand and one O atom from an aqua ligand. The croconate ligand bridges the MnII ions in a bis-bidentate chelation mode, forming an extended [Mn(C5O5)]n chain running parallel to the [001] direction, with the lipophilic 2,2,-bipy ligands lying along one side and the hydrophilic water molecules along the opposite side. Coordinated water and solvent water molecules are arranged in the hydrophilic layer, which is characterized by O,H...O hydrogen bonds between croconate ligands. Meanwhile, 2,2,-bipy ligands from adjacent chains partially overlap and exhibit ,,, interactions to form a lipophilic layer. The hydrophilic and lipophilic layers are arranged alternately to build a layer structure. [source]

catena -Poly[bis[silver(I)-,2 -4,4,-bipyridine-,2N:N,] naphthalene-2,6-dicarboxylate tetrahydrate]: self-assembly of a supramolecular framework via coordination bonds and supramolecular interactions

ACTA CRYSTALLOGRAPHICA SECTION C, Issue 11 2009
Di Sun
The ultrasonic reaction of AgNO3, 4,4,-bipyridine (bipy) and naphthalene-2,6-dicarboxylic acid (H2NDC) gives rise to the title compound, {[Ag2(C10H8N2)2](C12H6O4)·4H2O}n. The NDC dianion is located on an inversion centre. The AgI centre is coordinated in a linear manner by two N atoms from two bipy ligands. The crystal structure consists of one-dimensional AgI,bipy cationic chains and two-dimensional NDC,H2O anionic sheets, constructed by coordination bonds and supramolecular interactions, respectively. [source]

catena -Poly[silver(I)-,2 -4,4,-bipyridine-,2N:N,-,3 -chlorido]: self-assembly of a two-dimensional bilayer silver(I) coordination polymer from AgCl and a bipodal spacer

ACTA CRYSTALLOGRAPHICA SECTION C, Issue 11 2009
Di Sun
The title compound, [AgCl(C10H8N2)]n, was synthesized by reaction of silver(I) chloride with 4,4,-bipyridine (bipy) under ammoniacal conditions. The crystal structure reveals that the Ag and Cl atoms lie on twofold axes, while the bipy ligands also sit across twofold axes. The AgI center is five-coordinated by three Cl atoms and two N atoms from two symmetry-related bipy ligands in a distorted square-pyramidal geometry. The complex contains one-dimensional AgI,bipy chains, which are further linked by rarely formed T-frame ,3 -Cl to form a two-dimensional bilayer structure. [source]

Poly[[diaqua-,-4,4,-bipyridine-dinitratodi-,- l -tyrosinato-dicopper(II)]: a chiral two-dimensional coordination polymer

ACTA CRYSTALLOGRAPHICA SECTION C, Issue 1 2009
Shuo Zhang
The title compound, [Cu2(C9H10NO3)2(NO3)2(C10H8N2)(H2O)2]n, contains CuII atoms and l -tyrosinate (l -tyr) and 4,4,-bipyridine (4,4,-bipy) ligands in a 2:2:1 ratio. Each Cu atom is coordinated by one amino N atom and two carboxylate O atoms from two l -tyr ligands, one N atom from a 4,4,-bipy ligand, a monodentate nitrate ion and a water molecule in an elongated octahedral geometry. Adjacent Cu atoms are bridged by the bidentate carboxylate groups into a chain. These chains are further linked by the bridging 4,4,-bipy ligands, forming an undulated chiral two-dimensional sheet. O,H...O and N,H...O hydrogen bonds connect the sheets in the [100] direction. This study offers useful information for the engineering of chiral coordination polymers with amino acids and 4,4,-bipy ligands by considering the ratios of the metal ion and organic components. [source]

(1,3-Dimethylimidazolidine-2-selone-,Se)bis(1,10-phenanthroline-,2N,N,)copper(II) bis(perchlorate) and bis(2,2,-bipyridyl-,2N,N,)(imidazolidine-2-thione-,S)copper(II) bis(perchlorate)

ACTA CRYSTALLOGRAPHICA SECTION C, Issue 8 2007
Alexander J. Blake
In the first title salt, [Cu(C12H8N2)2(C5H10N2Se)](ClO4)2, the CuII centre occupies a distorted trigonal,bipyramidal environment defined by four N donors from two 1,10-phenanthroline (phen) ligands and by the Se donor of a 1,3-dimethylimidazolidine-2-selone ligand, with the equatorial plane defined by the Se and by two N donors from different phen ligands and the axial sites occupied by the two remaining N donors, one from each phen ligand. The Cu,N distances span the range 1.980,(10),2.114,(11),Å and the Cu,Se distance is 2.491,(3),Å. Intermolecular ,,, contacts between imidazolidine rings and the central rings of phen ligands generate chains of cations. In the second salt, [Cu(C10H8N2)2(C3H6N2S)](ClO4)2, the CuII centre occupies a similar distorted trigonal,bipyramidal environment comprising four N donors from two 2,2,-bipyridyl (bipy) ligands and an S donor from an imidazolidine-2-thione ligand. The equatorial plane is defined by the S donor and two N donors from different bipy ligands. The Cu,N distances span the range 1.984,(6),2.069,(7),Å and the Cu,S distance is 2.366,(3),Å. Intermolecular ,,, contacts between imidazolidine and pyridyl rings form chains of cations. A major difference between the two structures is due to the presence in the second complex of two N,H...O hydrogen bonds linking the imidazolidine N,H hydrogen-bond donors to perchlorate O-atom acceptors. [source]

The layered compound poly[,2 -4,4,-bipyridyl-di-,2 -chlorido-mercury(II)]

ACTA CRYSTALLOGRAPHICA SECTION C, Issue 5 2007
Yi-Ming Xie
The title compound, [HgCl2(C10H8N2)]n, features two-dimensional [HgCl2(4,4,-bipy)]n neutral networks (4,4,-bipy is 4,4,-bipyridine), based on an octahedral Hg atom coordinated by four ,2 -Cl atoms and two ,2 -4,4,-bipy ligands in trans positions, yielding a HgCl4N2 octahedron. The structure has mmm symmetry about the Hg atoms, with most of the atoms on at least one mirror plane, but the unsubstituted C atoms of the 4,4,-bipy rings are disordered across a mirror plane. Photoluminescent investigations reveal that the title compound displays a strong emission in the green region, which probably originates from a ligand-to-ligand charge-transfer transition. [source]

catena -Poly[[[triaqua­sulfato­cobalt(II)]-,-4,4,-bipyridine] ethane-1,2-diol solvate]

ACTA CRYSTALLOGRAPHICA SECTION C, Issue 9 2006
Wen-Jie Lu
In the title compound, {[Co(SO4)(C10H8N2)(H2O)3]·C2H6O2}n, each CoII center is octa­hedrally coordinated by two N atoms from two bridging 4,4,-bipyridine (bipy) ligands and four O atoms, one from a monodentate sulfate ligand and three from aqua ligands. The bipy ligands occupy special positions of site symmetry and bridge adjacent cobalt(II) centers to form one-dimensional linear coordination chains. Adjacent chains are arranged in a cross-like fashion around the mid-point of the bipy ligands, resulting in a three-dimensional supra­molecular array. [source]