Recent advances in organophosphorus-chalcogen and organophosphorus-pincer based macrocyclic compounds and their metal complexes

The design and development of phosphorus based macrocycles containing one or more other heteroatoms is of crucial importance for the enhancement of modern synthetic chemistry. In recent years focus on phosphorus based macromolecules has led to intriguing and innovative structures with a variety of applications, including photophysical and host-guest properties, and in organic synthesis. This article summarizes the recent advancements in the synthesis of macrocycles that consist of organophosphorus-chalcogen (P-E, P[double bond, length as m-dash]E; E = O, S, Se) and organophosphorus-pincer based macrocyclic ligands and their transition metal complexes with emphasis given to synthetic methodologies. The reactions involve the modification of simple macrocycles with phosphorus sources or phosphorus-based chalcogenating reagents. Transition metal complexes of phosphine-based macrocyclic pincer ligands and their reactivity are also included.

Catechol and 1,2,4,5-tetrahydroxybenzene functionalized cyclodiphosphazane ligands: synthesis, structural studies, and transition metal complexes

This paper describes the syntheses of two novel cyclodiphosphazane derivatives and their coordination chemistry with Cu^I, Ru^II, Rh^I, Pd^II and Au^I is also described.

Hydrogen-bonding cyclodiphosphazanes: superior effects of 3,5-(CF3)2-substitution in anion-recognition and counter-ion catalysis

Syntheses, X-ray characterization and employment of new cyclodiphosph(v)azane hydrogen-bonding catalysts in experimental and computational anion recognition and the N-acyl-Mannich reaction.

Isomerisation, reactivity and coordination chemistry of a new hybrid, multi-functional phosphazane

The unsymmetrical P^III/P^V cyclodiphosphazane [(S)(H)P(μ-N^tBu)₂PNH^tBu] provides entry into the mixed chalgogenide dianion [(S)P(μ-N^tBu)₂P(Se)N^tBu]²⁻, and unique insight into the mechanisms of cis/trans isomerism in phosph(iii)- and phosph(v)-azanes.

A versatile hard–soft N/S-ligand for metal coordination and cluster formation

The new ligand [S-P(μ-N^tBu)]₂²⁻ has adaptable hard–soft character with respect to the coordinated metal centre and can be used to construct large cage architectures.