Effect of lengthening alkyl spacer on hydroformylation performance of tethered-phosphine modified Rh/SiO2 catalyst

Rh/SiO2 catalysts with tethered-phosphines with different alkyl spacer lengths have been prepared, tested and characterized. Lengthening the alkyl spacer of the tethered-phosphine improved the flexibility of tethered-phospine, promoted the formation of active species and enhanced the activity of hydroformylation over other tethered-phosphine modified Rh/SiO2 catalysts.

Graphical AbstractLengthening the alkyl spacer of the tethered-phosphine was beneficial in forming more active species and enhancing the catalytic performance of a tethered-phosphine modified Rh/SiO2 catalyst for ethylene hydroformylation.Figure optionsDownload as PowerPoint slide