| abstract |
(57) [Summary] (Modified) [Objective] To provide hydroformylation for producing 1,6-hexanedial from butadienes at a high conversion rate. The butadienes are reacted with hydrogen and carbon monoxide in the presence of a catalytic amount of rhodium complexed with a polyphosphite ligand of the general formula I. [Y is a divalent organic group having 5 or more Cs, X contains 12 or more Cs, contains 2 or more branched alkyl groups, and X An organic group having a valence of m supplied by the group C, provided that two or more of the C providing the valence of the group X are separated from each other by at most 10 atoms and m is 2-6] |