Reactivity of Ti(bipy)3 and preparation of the Li(THF)4[Al(bipy)2] complex with the dinegative bipy ligand

Polyhedron ◽  
2004 ◽  
Vol 23 (4) ◽  
pp. 561-566 ◽  
Author(s):  
Grigori B. Nikiforov ◽  
Herbert W. Roesky ◽  
Mathias Noltemeyer ◽  
Hans-Georg Schmidt
Keyword(s):  
Bipy Ligand

scholarly journals Redetermination of (2,2′-bipyridine-κ2N,N′)dichloridopalladium(II) dichloromethane solvate

2009 ◽  
Vol 65 (6) ◽  
pp. m615-m616 ◽  
Author(s):  
Nam-Ho Kim ◽  
In-Chul Hwang ◽  
Kwang Ha
Keyword(s):  
Hydrogen Bonds ◽  
Structure Refinement ◽  
Chloride Ions ◽  
Fourier Synthesis ◽  
Complex Molecules ◽  
Bipy Ligand ◽  
Π Interactions ◽  
Centroid Distance ◽  
Square Planar ◽  
Difference Fourier

In the title compound, [PdCl2(C10H8N2)]·CH2Cl2, the Pd2+ion is four-coordinated in a slightly distorted square-planar environment by two N atoms of the 2,2′-bipyridine (bipy) ligand and two chloride ions. The compound displays intramolecular C—H...Cl hydrogen bonds and pairs of complex molecules are connected by intermolecular C—H...Cl hydrogen bonds. Intermolecular π–π interactions are present between the pyridine rings of the ligand, the shortest centroid–centroid distance being 4.096 (3) Å. As a result of the electronic nature of the chelate ring, it is possible to create π–π interactions to its symmetry-related counterpart [3.720 (2) Å] and also with a pyridine ring [3.570 (3) Å] of the bipy unit. The present structure is a redetermination of a previous structure [Vicenteet al.(1997). Private communication (refcode PYCXMN02). CCDC, Cambridge, England]. In the new structure refinement all H atoms were located in a difference Fourier synthesis. Their coordinates were refined freely, together with isotropic displacement parameters.

Synthesis, crystal structure and nonlinear optical properties of a cluster compound containing the bipy ligand

2004 ◽  
Vol 29 (2) ◽  
pp. 185-188 ◽  
Author(s):  
Jian-Liang Zhou ◽  
Yi-Zhi Li ◽  
He-Gen Zheng ◽  
Xin-Quan Xin ◽  
Tao Yin ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Optical Properties ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Cluster Compound ◽  
Bipy Ligand

scholarly journals (2,2′-Bipyridine-κ2N,N′)bis(4-formylbenzoato-κO1)copper(II)

2012 ◽  
Vol 68 (8) ◽  
pp. m1062-m1063 ◽  
Author(s):  
Jin-li Qi ◽  
Wei Xu
Keyword(s):  
Hydrogen Bonding ◽  
Rotation Axis ◽  
Planar Geometry ◽  
Carboxylate Group ◽  
Two Dimensional ◽  
Complex Molecules ◽  
Bipy Ligand ◽  
Hydrogen Bonding Interactions ◽  
Carboxylate Groups ◽  
Square Planar

The title mononuclear CuIIcomplex, [Cu(C8H5O3)2(C10H8N2)], is comprised of a CuIIcation, two 4-formylbenzoate (L−) ligands and a 2,2′-bipyridine (bipy) ligand. The CuIIion and bipy ligand lie on a crystallographic twofold rotation axis; the CuIIion is coordinated by two N atoms from one bipy ligand and two O atoms from two different carboxylate groups of twoL−ligands, exhibiting effectively a distorted square-planar geometry. The complex molecules are interlinked to generate two-dimensional supramolecular layers in theabplane, formed by C—H...O hydrogen bonds, where the O acceptor is the O atom from the carboxylate group not involved in coordination to the CuIIion. The two-dimensional layers are stacked in a sequenceviaC—H...O hydrogen-bonding interactions where the formyl O atom acts as acceptor.

Synthesis of one-dimensional bis-porphyrinic compounds with a transition metal complex as bridging unit

2004 ◽  
Vol 08 (01) ◽  
pp. 82-92 ◽  
Author(s):  
Jean-Claude Chambron ◽  
Jean-Paul Collin ◽  
Isabelle Dixon ◽  
Valérie Heitz ◽  
Xavier J. Salom-Roig ◽  
...  
Keyword(s):  
Transition Metal ◽  
Spatial Arrangement ◽  
Metal Center ◽  
Central Complex ◽  
Octahedral Complex ◽  
Central Position ◽  
Bipy Ligand ◽  
Central Transition ◽  
Terpyridine Ligands ◽  
Transfer Properties

Linear multicomponent systems, consisting of two porphyrins attached to a central transition metal center, have been prepared and some of their electron- or energy transfer properties have been studied. Each porphyrin is covalently bound to a bidentate or a terdentate ligand, these coordinating molecules being gathered around the metal to afford the desired structure. The spatial arrangement is such that the porphyrinic components are located at both ends of an axis, the transition metal occupying its center. The edge-to-edge distance between the porphyrins is relatively large (~ 20 to 25 Å) and, due to the rigidity of the connectors, it is very well controlled. Three different strategies have been used to construct such assemblies. In the first approach, the porphyrinic fragments are attached at the back of 2,2′,6′,2″-terpyridine ligands (terpy), on the central position (4′). After reaction with an appropriate metal center (ruthenium(II) or iridium(III)), an octahedral complex is obtained which constitutes the central part of the assembly, whereas the porphyrins are at the periphery of the central complex. The second strategy involves the preparation of a 5,5′-disubstituted 2,2′-bipyridine (bipy) ligand followed by its coordination to ruthenium(II). Subsequently, the porphyrinic nuclei are constructed at both ends of the substituents, leading to a linear geometry with a central complex and two laterally-disposed porphyrins. Finally, a very special ligand has been designed and synthesized, which incorporates two 1,10-phenanthroline nuclei (phen). This ligand can wrap itself around an octahedral center (ruthenium(II)) so as to generate a helical arrangement. Both ends of the single-stranded helix can subsequently be attached to porphyrins.

Kinetics of the Substitution of Norbornadiene in Tetracarbonyl(norbomadiene)molybdenum(0) by 2,2'-Bipyridine

2001 ◽  
Vol 56 (3) ◽  
pp. 281-286 ◽  
Author(s):  
Ceyhan Kayran ◽  
Eser Okan
Keyword(s):  
Reaction Rate ◽  
Activation Parameters ◽  
Bipy Ligand ◽  
First Order ◽  
Rate Determining Step ◽  
Vis Spectroscopy ◽  
Different Temperatures ◽  
Ft Ir ◽  
Thermal Substitution ◽  
Kinetics Of

Abstract The kinetics of the thermal substitution of norbornadiene (nbd) by 2,2'-bipyridine (2,2'-bipy) in (CO)4Mo(C7H9) was studied by quantitative FT-IR and UV-VIS spectroscopy. The reaction rate exhibits first-order dependence on the concentration of the starting complex, and the observed rate constant depends on the concentration of both leaving nbd and entering 2,2'-bipy ligand. The mechanism was found to be consistent with the previously proposed one, where the rate determining step is the cleavage of one of the two Mo-olefin bonds. The reaction was performed at four different temperatures (35 -50 °C) and the evaluation of the kinetic data gives the activation parameters which now support states.

scholarly journals Poly[[(μ4-benzene-1,3,5-tricarboxylato-κ4O1:O1′:O2:O3)bis(2,2-bipyridine-κ2N,N′)(μ2-hydroxido)dicopper(II)] trihydrate]

2014 ◽  
Vol 70 (7) ◽  
pp. m270-m271
Author(s):  
Mohamed N. El-kaheli ◽  
Ramadan M. El-mehdawi ◽  
Ramadan G. Abuhmaiera ◽  
Mufida M. Ben Younes ◽  
Fathia A. Treish ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Crystal Packing ◽  
Water Molecules ◽  
Two Dimensional ◽  
Aromatic Rings ◽  
Bipy Ligand ◽  
Lattice Water ◽  
Pyramidal Geometry ◽  
Polymeric Layer ◽  
Square Pyramidal Geometry

In the title two-dimensional coordination polymer, {[Cu2(C9H3O6)(OH)(C10H8N2)2]·3H2O}n, each of the two independent CuIIatoms is coordinated by a bridging OH group, two O atoms from two benzene-1,3,5-tricarboxylate (L) ligands and two N atoms from a 2,2- bipyridine (bipy) ligand in a distorted square-pyramidal geometry. EachLligand coordinates four CuIIatoms, thus forming a polymeric layer parallel to thebcplane with bipy molecules protruding up and down. The lattice water molecules involved in O—H...· O hydrogen bonding are situated in the inner part of each layer. The crystal packing is consolidated by π–π interactions between the aromatic rings of bipy ligands from neigbouring layers [intercentroid distance = 3.762 (3) Å].

scholarly journals Influence of the Nucleophilic Ligand on the Reactivity of Carbonyl Rhenium(I) Complexes towards Methyl Propiolate: A Computational Chemistry Perspective

Molecules ◽  
2020 ◽  
Vol 25 (18) ◽  
pp. 4134
Author(s):  
Daniel Álvarez ◽  
Elena López-Castro ◽  
Arturo Guerrero ◽  
Lucía Riera ◽  
Julio Pérez ◽  
...  
Keyword(s):  
Computational Chemistry ◽  
Aromatic Ring ◽  
Theoretical Study ◽  
Methyl Substituent ◽  
Carbonyl Ligand ◽  
Amido Ligands ◽  
Bipy Ligand ◽  
Coupling Product ◽  
Methyl Propiolate ◽  
The One

A comparative theoretical study on the reactivity of the complexes [ReY(CO)3(bipy)] (Y = NH2, NHMe, NHpTol, OH, OMe, OPh, PH2, PHMe, PMe2, PHPh, PPh2, PMePh, SH, SMe, SPh; bipy = 2,2′-bipyridine) towards methyl propiolate was carried out to analyze the influence of both the heteroatom (N, O, P, S) and the alkyl and/or aryl substituents of the Y ligand on the nature of the product obtained. The methyl substituent tends to accelerate the reactions. However, an aromatic ring bonded to N and O makes the reaction more difficult, whereas its linkage to P and S favour it. On the whole, ligands with O and S heteroatoms seem to disfavour these processes more than ligands with N and P heteroatoms, respectively. Phosphido and thiolato ligands tend to yield a coupling product with the bipy ligand, which is not the general case for hydroxo, alcoxo or amido ligands. When the Y ligand has an O/N and an H atom the most likely product is the one containing a coupling with the carbonyl ligand, which is not always obtained when Y contains P/S. Only for OMe and OPh, the product resulting from formal insertion into the Re-Y bond is the preferred.

scholarly journals Reduction of a 1,4-diazabutadiene and 2,2’-bipyridine using magnesium(I) compounds

2020 ◽  
Vol 43 (1) ◽  
pp. 177-180
Author(s):  
K. Yuvaraj ◽  
Cameron Jones
Keyword(s):  
Crystal Structures ◽  
Reducing Agents ◽  
Bipy Ligand ◽  
X Ray ◽  
Redox Active

Abstractβ-diketiminate coordinated magnesium(I) compounds, [{(ArNacnac)Mg}2] (ArNacnac = [(ArNCMe)2CH]– (Ar = 2,6-diisopropylphenyl (Dip) or mesityl (Mes)), have been utilized as reducing agents in reactions with the redox active 1,4-diazabutadiene, (ButNCH)2 (ButDAB), and 2,2’-bipyrine (bipy). These reactions led to one-electron reductions of the unsaturated substrate, and formation of the highly colored radical complexes, [(ArNacnac) Mg(ButDAB•)] and [(MesNacnac)Mg(bipy•)(bipy)]. The X-ray crystal structures of the compounds reveal each to possess one singly reduced ButDAB or bipy ligand.

Crystallization and structural properties of a family of isotopological 3D-networks: the case of a 4,4′-bipy ligand–M2+ triflate system

CrystEngComm ◽  
2018 ◽  
Vol 20 (26) ◽  
pp. 3784-3795 ◽  
Author(s):  
Silvia Rizzato ◽  
Massimo Moret ◽  
Fabio Beghi ◽  
Leonardo Lo Presti
Keyword(s):  
X Ray Diffraction ◽  
Network Stability ◽  
Metal Centre ◽  
Time Resolved ◽  
Bipy Ligand ◽  
X Ray ◽  
Process Characterization ◽  
System P ◽  
3D Networks

Desolvation process characterization of a flexible coordination network performed by time-resolved single-crystal X-ray diffraction. Influence of the metal centre on the network stability.

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