Synthesis and Characterization of Controlled Dendritic Architectures by Association of Two Phosphorus Dendrons Through a Metallic Center

Abstract

The reactions of RuCl 2 (PPh 3 ) 3 with either a small amino diphosphine or a first-generation phosphorus-containing dendron possessing an aminodiphosphine as the core induce the formation of complexes in which two amino diphosphines are associated through the metallic center. Determination of the structure of the smallest complex by X-ray diffraction shows that the metal is surrounded by a square-based bi-pyramid defined by the four phosphorus atoms of both diphosphines in a single plane, with the chlorine atoms at both summits. The first generation dendrons behave in the same way as the small compound, and allow us to isolate an original bis dendron, associated through the ruthenium atom.