Macrocyclic cyclodiphosphazane $$[\{\hbox {P}(\mu \hbox {-}^{t}\hbox {BuN})\}_{2}(\hbox {O}-m-\hbox {C}_{6}\hbox {H}_{4}\hbox {CHNCH}_{2})_{2}]_{2}$$ [ { P ( μ - t BuN ) } 2 ( O - m - C 6 H 4 CHNCH 2 ) 2 ] 2 : synthesis of chalcogen derivatives and gold(I) complex

Abstract

The synthesis of a Schiff base-appended macrocycle [{P(μ-t BuN)} 2 (O − m − C 6 H 4 CHNCH 2) 2 ] 2 (1) containing cyclodiphosphazane moieties is described. Reactions of 1 with H 2 O 2 and elemental selenium yielded derivatives tetrakis(oxide) [{P(O)(μ-t BuN)} 2 (O − m − C 6 H 4 CHNCH 2) 2 ] 2 (2) and tetrakis(selenide)[{P(Se)(μ-t BuN)} 2 (O − m − C 6 H 4 CHNCH 2) 2 ] 2 (3), in ∼80% yield. Tetragold complex [Au 4 Cl 4 {{P(μ-t BuN)} 2 (O − m − C 6 H 4 CHNCH 2) 2 } 2 ] (4) was prepared by reacting 1 with [AuCl(SMe 2)] in 1:4 molar ratio. All the compounds have been characterized by various spectroscopic techniques. The molecular structure of 3 was confirmed by single crystal X-ray analysis.

Synergic Topological- and Size-Control on Phosphazane Chemistry: First Unfolded Hybrid Tetrameric Macrocycle

“…Generally, the formation of hybrid cyclic derivatives are performed in a one-step synthetic approach using an equimolar amount of reactants (i.e., cyclophaphazane and organic linker) in the presence of excess triethylamine. [33][34][35][36][37][38] The size of the macrocyclic products formed (e.g., di-, tri-and tetrameric species) however is strictly determined by the nature of the bifunctional linkers employed and governed by the most thermodynamic products. [33,34,39] Within the hybrid phosphazane macrocyclic family there is a large number of reported examples of condensation reactions comprising symmetric bifunctional organic linkers (L-L) to produce hybrid inorganic-organic macrocycles of general formula [(μ-L-L)P(μ-N t Bu)] n .…”