Trifunctional Phosphane Ligands and Their Application in the Synthesis of Novel Cage-Structured Platinacyclophanes and Trinuclear Chain-Like Platinacycles by Self-Assembly

Abstract

Keywords: Cyclophanes / Platinum / P ligands / Supramolecular chemistry / Self assembly The synthesis of the 1,3,5-tris[(diphenylphosphoryl)alkyl]-benzenes 7−10 succeeds by reaction of the corresponding 1,3,5-tris(bromoalkyl)benzenes 3−6 with ethyl diphenylphosphinite in an Arbusov-type reaction. Reduction of these phosphane oxides leads to the trifunctional phosphane ligands 11−14. Their potency of self-assembly was examined by the employment of platinum(II) complex fragments. A five-component self-assembly consisting of 3 equiv. of the platinum complex Cl 2 Pt(NCPh) 2 and 2 equiv. of the ligands 11−14 un-

Threefold symmetric trimetallic macrocycles formed via the Weak-Link Approach

“…Herein, we report the first application of the Weak-Link Approach to the formation of trimetallic (17)(18)(19)(20) rhodium and iridium macrocycles from a flexible threefold symmetric hemilabile ligand.…”

Expedient Synthesis of Substituted (Diphenylphosphinoylmethyl)benzenes

“…At first sight, (diphenylphosphinoylmethyl)benzenes appear as unreactive and or unexciting chemical entities, but in fact, they have been used in a wide spectra of interesting and diverse reactions. They have, for example, been employed as key reagents and or catalysts in novel podands for the complexation of ammonium cations, ligands for the hydroformylation of alkenes, hydrogen-bonding hosts, ligands for metal−ion extraction, analogues of methadone, precursor ligands to caged platinacycles, precursors of PCP pincer ligands, and synthesis of coordination complexes and as key reagents within the Ramburg−Bäcklund reaction . Surveying the literature, we were surprised that the application of microwave irradiation for the efficient and expedient synthesis of (diphenylphosphinoylmethyl)benzene adducts had not been reported .…”