Complexation to FeII, NiII, and ZnII of Multidentate Ligands Resulting from Condensation of 2-Pyridinecarboxaldehyde with α,ω-Triamines: Selective Imidazolidine/Hexahydropyrimidine Ring Opening Revisited

doi:10.1021/IC050791B

Paper

Complexation to FeII, NiII, and ZnII of Multidentate Ligands Resulting from Condensation of 2-Pyridinecarboxaldehyde with α,ω-Triamines: Selective Imidazolidine/Hexahydropyrimidine Ring Opening Revisited

Published Oct 25, 2005 · N. Bréfuel, C. Lepetit, S. Shova

Inorganic Chemistry

Q1 SJR score

34

Citations

0

Influential Citations

Full textSemantic Scholar

Abstract

The condensation reaction between 2-pyridinecarboxaldehyde and diethylenetriamine, 3-[(2-aminoethyl)amino]propylamine, and 3,3‘-iminobis(propylamine) in a 2:1 molar ratio yields ligands that may be isolated exclusively in the dissymmetric (cyclic) isomeric forms LA, LB/LB*, and LC. The template effect of a metal center (FeII, NiII,and ZnII) results in the ring opening of LC including one hexahydropyrimidine ring and one (long) propylene bridge. The resulting symmetric bis-Schiff base isomeric form LC‘ is stabilized through pentacoordination, yielding [FeIILC‘(NCS)](NCS) (3), [NiIILC‘(NCS)](NCS) (6), and [ZnIILC‘(NCS)](NCS) (9). The same metal centers are too bulky to exert a template effect on LA including one imidazolidine ring and one (short) ethylene bridge. LA acts as a tetradentate ligand yielding [FeIILA(NCS)2] (1), [NiIILA(NCS)2] (4), and [ZnIILA(NCS)2] (7). The template effect of the metal center is selective toward the ligand LB/LB* including a hexahydropyrimidine (imidazolidine) ring and the sho...

Study Snapshot

The template effect of metal centers on multidentate ligands from 2-pyridinecarboxaldehyde condensation with,-triamines leads to selective ring opening of LB/LB* and LC, with potential applications in catalysis and synthesis of new compounds.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

Sign up to use Study Snapshot

Consensus is limited without an account. Create an account or sign in to get more searches and use the Study Snapshot.

Create an account

Paper

Complexation to FeII, NiII, and ZnII of Multidentate Ligands Resulting from Condensation of 2-Pyridinecarboxaldehyde with α,ω-Triamines: Selective Imidazolidine/Hexahydropyrimidine Ring Opening Revisited

Sign up to use Study Snapshot

References

Citations

Metal and solvent dependent formation of imidazolidine or hemiaminal ether complexes

The coordination environment around metal ions and solvents significantly influences the formation of imidazolidinylpyridine complexes, with acetonitrile maintaining the ligand's integrity and methanol forming hemiaminal ether.

An unexpected single crystal structure of nickel(II) complex: Spectral, DFT, NLO, magnetic and molecular docking studies

The synthesized nickel complex shows potential as an inhibitor against COVID-19's main protease Mpro, with remarkable binding energy and in silico prediction of its ADME pharmacokinetic profiles.

Synthesis, characterization and DFT investigation of new metal complexes of Ni(II), Mn(II) and VO(IV) containing N,O-donor Schiff base ligand

New metal complexes with N,O-donor Schiff base ligands have been synthesized, characterized, and studied by Density Functional Theory.

Competitive 7Li NMR studies of the complexation of some metal ions with a novel heptadentate (N7) macrocyclic Schiff base ligand having two pyridyl units as pendant arms in acetonitrile and methanol mixture (50:50)

The stability of metal ions complexed with MSb in acetonitrile and methanol mixture (50:50) varies in the order Zn2+-MSb, Mn2+-MSb, Cd2+-MSb, UO2+-MSb, Ca2+-

Complexation of an indole-based α-aminoimine ligand to Pd(II)

The indole-based -aminoimine ligand 6-Me-4-i Pr-6-(2,6-i Pr2 -C 6 H 3 )N CMe-6,11-dihydro-5 H-indolo[3,2-c]quinoline (

Substituents drive ligand rearrangements, giving dinuclear rather than mononuclear complexes, and tune CoII/III redox potential.

Substituents in tetradentate imine ligands drive ligand rearrangements, leading to unexpected dinuclear complexes and tuning CoII/III redox potential.

A hemiaminal-ether structure stabilized by lanthanide complexes with an imidazole-based Schiff base ligand.

The hemiaminal-ether structure stabilized by lanthanide complexes can sensitize Tb3+ luminescence, with ligand component exchange resulting in significant spectral changes.

Phase Change Transformations with Dynamically Addressable Aminal Metallogels.

Dynamically addressable aminal metallogels can transform gels into liquids and back to gels, offering potential for self-healing and triggered release functionality in various applications.