Rhodium(I) iminophosphine poly(propyleneimine) dendrimers: Synthesis, characterization and molecular structure of a mononuclear analogue

First (G<i>1</i>)- and second-generation (G<i>2</i>) poly(propyleneimine) (PPI) dendrimers were reacted with 2-(diphenylphosphino)benzaldehyde, to form iminophosphine-functionalised dendritic ligands (<b>1</b>, <b>2</b>). The reaction of the dimeric precursor [RhCl(CO)₂]₂ with the heterobidentate dendritic ligands <b>1</b>, <b>2</b> gave the corresponding rhodium(I) complexes (<b>3</b>, <b>4</b>).