Light‐Induced Ejection of a Tridentate Ligand from a Ruthenium(II) Complex

The synthesis of new tridentate, isoquinoline-derived ligands, involving successive Suzuki cross-coupling reactions, is described. We were able to resolve 1-[3-(2-hydroxy-phenyl)-isoquinolin-1-yl]-naphthalen-2-ol via molecular complexation with N-benzylcinchonidinium chloride, whereas 1,3-bis(2-hydroxy-naphthalen-1-yl)-isoquinoline was resolved by chromatographic separation of its epimeric camphorsulfonates. Their barrier to rotation about the central biaryl axis was evaluated via racemization studies. Application of enantiopure 1,3-bis(2-hydroxynaphthalen-1-yl)-isoquinoline in the addition of diethylzinc to aldehydes proceeded in moderate yield but without asymmetric induction. A new tridentate ligand, 4-tert-butyl-2-chloro-6-[1-(2-hydroxymethyl-naphthalen-1-yl)-isoquinolin-3-yl]-phenol, was prepared in good yield and resolved by semipreparative high-performance liquid chromatography (HPLC). Its application in the addition of diethylzinc to a range of aromatic aldehydes proceeded in near perfect enantioselectivities at low ligand loadings of 1 mol %.

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ChemInform Abstract: Ruthenium(II)-Catalyzed Thioether Oxidation. Part 2. Syntheses and Crystal Structures of Two Ruthenium(Il) Complexes with the New Linear Tridentate Ligand 3-(Ethylthio)-1-((3-(ethylthio)propyl)sulfinyl)propane.

Chemischer Informationsdienst ◽

10.1002/chin.198640286 ◽

1986 ◽

Vol 17 (40) ◽

Author(s):

D. P. RILEY ◽

J. D. OLIVER

Keyword(s):

Crystal Structures ◽

Tridentate Ligand

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Copper (II) halide complexes with NNO tridentate ligand as chromotropic probes; synthesis, structural characterization and spectroscopic properties

Journal of Molecular Structure ◽

10.1016/j.molstruc.2021.130930 ◽

2021 ◽

pp. 130930

Author(s):

Atie Shirvan ◽

Hamid Golchoubian ◽

Maxime A. Siegler ◽

Elisabeth Bouwman

Keyword(s):

Structural Characterization ◽

Spectroscopic Properties ◽

Tridentate Ligand ◽

Halide Complexes

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Komplexe des 1-Thia-4,7-diazacyclononans (L) mit Blei(II), Indium(III), Thallium(I) und (III) Kristallstruktur von [LPb][PbBr4] / Complexes of 1-Thia-4,7-diazacyclononane (L) with Lead(II), Indium(III), Thallium(I) and (III) Crystal Structure of [LPb][PbBr4]

Zeitschrift für Naturforschung B ◽

10.1515/znb-1988-0513 ◽

1988 ◽

Vol 43 (5) ◽

pp. 567-570 ◽

Cited By ~ 5

Author(s):

Peter Hoffmann ◽

Franz-Josef Hermes ◽

Rainer Mattes

Keyword(s):

Crystal Structure ◽

Lone Pair ◽

Tridentate Ligand ◽

Crystal Data ◽

Orthorhombic Space Group ◽

Space Group

Abstract The reaction of 1-thia-4,7-diazacyclononane (C6H14N2S = L) with salts containing Tl(I) and (III), In(III) and Pb(II) ions yields 1:1 complexes, which can be crystallized as halide or Perchlorate salts. The structure of [LPb][PbBr4] (5) has been determined: Crystal data: orthorhombic, space group P212121, a = 853.2(6), b = 1000.1(4), c = 1860(1) pm, Z = 4. Pb2+ in the [LPb]2+ cation is seven-coordinated by the tridentate ligand and a square of four Br- ions. The Pb-S distance, 286.0(5) pm, is rather short, the lone pair stereochemically activ. The PbBr4- ions are polymeric with octahedrally coordinated lead(II) atoms.

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Molecular structures of nickel(II) monochelates of a racemic tridentate ligand and co-ligand induced structural variations

Inorganica Chimica Acta ◽

10.1016/j.ica.2010.09.007 ◽

2011 ◽

Vol 365 (1) ◽

pp. 177-182 ◽

Cited By ~ 15

Author(s):

Himanshu Sekhar Jena ◽

Japyesan Subramanian ◽

Vadivelu Manivannan

Keyword(s):

Molecular Structures ◽

Tridentate Ligand ◽

Structural Variations

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Unsymmetrical Schiff Base Functionalized as Monobasic Tridentate Ligand on Complexation with Some Transition Metal Ions

E-Journal of Chemistry ◽

10.1155/2012/503936 ◽

2012 ◽

Vol 9 (2) ◽

pp. 532-544

Author(s):

Bibhesh K. Singh ◽

Narendar Bhojak ◽

Anant Prakash

Keyword(s):

Schiff Base ◽

Transition Metal Ions ◽

Tridentate Ligand ◽

Planar Geometry ◽

Physico Chemical ◽

Square Planar ◽

Unsymmetrical Schiff Base ◽

Mm2 Calculations ◽

Microbial Potential

Cu(II), Co(II), Ni(II) and Mn(II) complexes of Schiff base derived from 2-aminophenol and pyrrole-2- carbaldehyde have been prepared. The complexes are formed by coordination of N and O atoms of the ligand. Their structures were characterized by physico-chemical and spectroscopic methods. Molecular structure of the complexes has been optimized by MM2 calculations and suggests a tetrahedral/ square planar geometry. The bio-efficacy of the ligand and their complexes has been examined against the growth of bacteriain vitroto evaluate their anti-microbial potential.

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