scholarly journals meso-Porphyrinylphosphine Oxides:  Mono- and Bidentate Ligands for Supramolecular Chemistry and the Crystal Structures of Monomeric {[10,20-Diphenylporphyrinatonickel(II)-5,15-diyl]-bis-[P(O)Ph2] and Polymeric Self-Coordinated {[10,20-Diphenylporphyrinatozinc(II)-5,15-diyl]-bis-[P(O)Ph2]}

2006 ◽  
Vol 45 (16) ◽  
pp. 6479-6489 ◽  
Author(s):  
Farzad Atefi ◽  
John C. McMurtrie ◽  
Peter Turner ◽  
Martin Duriska ◽  
Dennis P. Arnold
Keyword(s):  
Crystal Structures ◽  
Supramolecular Chemistry ◽  
Bidentate Ligands

Importance of chelate–chelate stacking interactions in crystal structures of square pyramidal copper(II) complexes with two distinct chelating bidentate ligands

2016 ◽  
Vol 442 ◽  
pp. 16-23 ◽  
Author(s):  
Satavisha Bhattacharya ◽  
Sumit Roy ◽  
Klaus Harms ◽  
Antonio Bauza ◽  
Antonio Frontera ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Stacking Interactions ◽  
Bidentate Ligands

Bidentate Ligands by Supramolecular Chemistry — The Future for Catalysis?

ChemInform ◽  
2007 ◽  
Vol 38 (7) ◽  
Author(s):  
Albertus J. Sandee ◽  
Joost N. H. Reek
Keyword(s):  
Supramolecular Chemistry ◽  
Bidentate Ligands ◽  
The Future

Structural and spectroscopic studies of transition metal nitrite complexes. X. Crystal structures of cis-Bis(2,2'-bipyridine)(nitrito-O,O')nickel(II) nitrate and hydrated Tris(2,2'-bipyridine)nickel(II) nitrite/nitrate and sulfate. Stereochemistry of the [M(bidentate ligand)2(bidentate ligand')1] system

1981 ◽  
Vol 34 (10) ◽  
pp. 2177 ◽  
Author(s):  
AJ Finney ◽  
MA Hitchman ◽  
DL Kepert ◽  
CL Raston ◽  
GL Rowbottom ◽  
...  
Keyword(s):  
Transition Metal ◽  
Crystal Structures ◽  
Coordination Sphere ◽  
Nickel Atom ◽  
Spectroscopic Studies ◽  
Bidentate Ligand ◽  
The Other ◽  
Bidentate Ligands ◽  
Nitrite Nitrate ◽  
Oxygen Atoms

The crystal structures of the title compounds are reported. In all cases, the coordination sphere of the nickel atom comprises three bidentate ligands. In (1), [Ni(bpy)2(O2N)] NO3, (Ni-N) is 2.M2 � although there are small differences between those nitrogen atoms trans to the nitrite oxygen atoms and the other two. (Ni-O) is 2.12 �. In (2), [Ni(bpy)3] NO2/NO3,xH2O, and (3), [Ni(bpy)3]- SO4,7.5H2O, a redetermination, Ni-N is shown to be c. 2.09 �; serious disorder is present among the non-cationic components of (2), precluding a definite assignment of stoichiometry.

Crystal structures of (azido)(pentamethylcyclopentadienyl)iridium(III) complexes containing various types of bidentate ligands

Polyhedron ◽  
2009 ◽  
Vol 28 (11) ◽  
pp. 2287-2293 ◽  
Author(s):  
Takayoshi Suzuki ◽  
Mai Kotera ◽  
Asuka Takayama ◽  
Masaaki Kojima
Keyword(s):  
Crystal Structures ◽  
Bidentate Ligands

scholarly journals Crystal structures of three N-(pyridine-2-carbonyl)pyridine-2-carboxamides as potential ligands for supramolecular chemistry

2021 ◽  
Vol 77 (9) ◽  
Author(s):  
Xiaowen Xu ◽  
Richard Hoogenboom ◽  
Kristof Van Hecke
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Crystal Structures ◽  
Supramolecular Chemistry ◽  
General Procedure ◽  
Double Layers ◽  
X Ray ◽  
Face To Face ◽  
Excellent Yield

The synthesis and single-crystal X-ray structures of three N-(pyridine-2-carbonyl)pyridine-2-carboxamide imides, with or without F atoms on the 3-position of the pyridine rings are reported, namely, N-(pyridine-2-carbonyl)pyridine-2-carboxamide, C12H9N3O2 (1), N-(3-fluoropyridine-2-carbonyl)pyridine-2-carboxamide, C12H8FN3O2 (2), and 3-fluoro-N-(3-fluoropyridine-2-carbonyl)pyridine-2-carboxamide, C12H7F2N3O2 (3). The above-mentioned compounds were synthesized by a mild, general procedure with an excellent yield, providing straightforward access to symmetrical and/or asymmetrical heterocyclic ureas. The crystal structures of 1 and 2 are isomorphous, showing similar packing arrangements, i.e. double layers of parallel (face-to-face) molecules alternating with analogous, but perpendicularly oriented, double layers. In contrast, the crystal structure of 3, containing a fluoro- group at the 3-position of both pyridine rings, shows molecular arrangements in a longitudinal, tubular manner along the c axis, with the aromatic pyridine and carbonyl/fluorine moieties facing towards each other.

Complexes with New Chelate Anionic Ligands Formed by Nucleophilic Addition in Copper(II) Coordination Sphere. III. The Crystal Structures of (2,2'-Bipyridine-N,N')(cyanato-N)[methyl(2-cyano-2-imidoxy Ethaneimidate-N,N')]copper(II) and (2,2'-Bipyridine-N,N')(2-cyano-2-imidoxy Ethaneimidate-N,N')copper(II)

1999 ◽  
Vol 64 (4) ◽  
pp. 600-612 ◽  
Author(s):  
Michal Dunaj-Jurčo ◽  
Ivan Potočňák ◽  
Dušan Mikloš ◽  
Robert Klement
Keyword(s):  
Crystal Structure ◽  
Crystal Structures ◽  
Coordination Polyhedron ◽  
Nucleophilic Addition ◽  
Bidentate Ligands ◽  
Hydroxide Ion ◽  
Coordination Polyhedra ◽  
Anionic Ligands ◽  
Distorted Trigonal Bipyramid ◽  
Bonding Systems

Crystal structures of Cu(II) compounds with new chelate anionic ligands are presented. The formulae of these compounds are [Cu(bipy)(mcoe)(NCO)] (1) and [Cu(bipy)(coe)] (2), where bipy is 2,2'-bipyridine, mcoe and coe are the anionic chelate ligands methyl(2-cyano-2-imidoxy ethaneimidate), [(ON)(NC)C-C(NH)(OCH3)]1- (3), and 2-cyano-2-imidoxy ethaneimidate, [(ON)(NC)C-C(NH)(O)]2- (4), respectively, formed by nucleophilic addition of methanol and hydroxide ion to the coordinatively activated β-carbon of the nitroso-dicyanomethanide. Formation of the hydroxide ion from water in the reaction mixture can be explained by protonation of the C(CN)3- anion. The coordination polyhedra in 1 and 2 are quite different. The coordination polyhedron around the Cu(II) ion in 1 is a distorted trigonal bipyramid and in 2 a distorted square. The Cu(II) ion in 1 is coordinated by four N atoms from two bidentate ligands and one N atom from the NCO- group. The crystal structure consists of discrete molecules with {CuN5} chromophore. On the other hand, the Cu(II) ion in 2 is coordinated by four N atoms from two bidentate ligands in square coordination and the molecules are linked by weaker contacts between copper and oxygen atoms (Cu-O1i = 2.503(3), Cu-O2ii = 2.801(3) Å; i = -x, -y, -z + 1; ii = -x + 1, -y, -z + 1) to infinite chains parallel with c. Thus the coordination polyhedron is completed to an elongated tetragonal bipyramid with the {CuN4O*O*} chromophore. The angle O1i-Cu-O2ii is 167.9(1)° and the crystal structure cannot be considered as molecular but consisting of chains running in one direction. Inspection of the bond distances in mcoe and coe indicates strongly delocalized π-bonding systems. This is also supported by the fact that the anions are almost planar with bond angles close to 120°. The calculated Wiberg (bond-order) indices show that due to conjugation, the bonds within the metallocycle in mcoe and coe exhibit partially multiple character.

scholarly journals Metallkomplexe mit Hexamethylentetramin als Ligand, V II [1] Kristallstrukturen des Zinkchlorid-Adduktes ZnCl2 • C6H12N4 und des Zinkbromid-Adduktes ZnBr2-C6H12N4 / Metal Complexes with Hexamethylenetetramine as a Ligand, V II [1] Crystal Structures of the Zinc Chloride Adduct ZnCl2 • C6H12N4, and the Zinc Bromide Adduct ZnBr2 • C6H12N4

1985 ◽  
Vol 40 (12) ◽  
pp. 1756-1758 ◽  
Author(s):  
Joachim Pickardt ◽  
Pamela Droas
Keyword(s):  
Metal Complexes ◽  
Crystal Structures ◽  
Zinc Chloride ◽  
Standard Setting ◽  
Lattice Parameters ◽  
Bidentate Ligands ◽  
Orthorhombic Space Group ◽  
Zinc Bromide ◽  
Space Group ◽  
Chloride Adduct

Abstract By reaction of zinc chloride and zinc bromide with hexamethylenetetramine in water/methanol crystals of the adducts ZnCl2 • C6H12N4 and ZnBr2 • C6H12N4, resp. were obtained. The compounds are isotypic, they crystallize in the orthorhombic space group P21am (non-standard setting of space group Pmc21, No. 26), Z = 2. The lattice parameters of the zinc chloride adduct are a = 1168.0(4), b = 685.7(4), and c = 601.1(4) pm, of the zinc bromide adduct a - 1188.9(6), b = 721.5(5), and c = 602.3(4) pm. The adducts are polymeric, they form parallel chains in the crystal. The zinc atoms are bonded to two halogen atoms and, via nitrogen atoms, to two hexamethylenetetramine molecules, which act as bidentate ligands. The coordination of the zinc atoms is approximately tetrahedral

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