Water-soluble diphosphadiazacyclooctanes as ligands for aqueous organometallic catalysis

Two new water-soluble diphosphacyclooctanes been synthesized and characterized by NMR and surface tension measurements. Both phosphanes proved to coordinate rhodium in a very selective way as well-defined bidentates were obtained. When used in Rh-catalyzed hydroformylation of terminal alkenes, both ligands positively impacted the reaction chemoselectivity.

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► Two new water-soluble diphosphadiazacyclooctanes derivatives have been synthesized.
► Phosphanes displayed a κ2-P,P coordination mode on rhodium complexes.
► High chemoselectivity was measured in terminal alkenes Rh-catalyzed hydroformylation.