Rhodium catalysts with wide-bite-angle

When the rhodium complexes are coordinated by monodentate ligands they frequently show high activity and moderate selectivity for the linear aldehyde [89], but rhodium catalyst that contain bidentate ligands with wide bite angles frequently show a lower activity but an increased selectivity for the linear product [42]. 

Although early catalysts were based on cobalt, nowadays, rhodium catalysts are preferred because they require lower pressure and afford higher chemo- and regioselectivity [1,2]. In recent years, extensive research into the production of only linear aldehydes has provided impressive results. The application of phosphines with a wide bite angle in the rhodium catalyzed hydroformylation of terminal alkenes enable the regioselectivity to be almost totally controlled [3]. Branched selective hydroformylation, al-... 

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