Synthesis and characterization of the cyclodiphosphazane embedded macrocycle tetrabromo-resorcin[4]arene-tetrakis (cyclodiphosphazane) and its tetra-rhodium(I) complex

The synthesis of a cyclodiphosphazane embedded macrocycle, tetrabromo-resorcin[4]arene-tetrakis (cyclodiphosphazane) [(mu-N(Bu-t)P)(2){mu-(C6HBr(o-O)(2)-m-(CHBu)-Bu-n)}](4) (1), and its tetra-rhodium(I) complex [(mu-N(Bu-t)P)(2){mu-(C6HBr(o-O)(2)-m-CHnBu)}Rh(COD)Cl](4) ( 2) is described. The resorcin[4]arene backbone adopts a C-4v symmetric crown conformation in 1, which transforms into a C-2v symmetric boat conformation upon complexation with Rh(I) in the tetra-rhodium(I) complex 2, as evidenced by NMR spectroscopy and X-ray diffraction studies.

Automated summary

This paper describes the synthesis of a cyclodiphosphazane embedded macrocycle, tetrabromo-resorcin[4]arene-tetrakis (cyclodiphosphazane) [(mu-N(Bu-t)P)(2){mu-(C6HBr(o-O)(2)-m-(CHBu)-Bu-n)}](4) (1), and its tetra-rhodium(I) complex [(mu-N(Bu-t)P)(2){mu-(C6HBr(o-O)(2)-m-CHnBu)}Rh(COD)Cl](4) (2). NMR spectroscopy and X-ray diffraction studies indicate that the resorcin[4]arene backbone adopts a C-4v symmetric crown conformation in 1, which transforms into a C-2v symmetric boat conformation upon complexation with Rh(I) in the tetra-rhodium(I) complex 2.