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Cooperativity in Rh2 Complexes: High Catalytic Activity and High Regioselectivity in the Hydroformylation of Olefins

✍ Scribed by Prof. Dr. Georg Süss-Fink

Publisher: John Wiley and Sons
Year: 1994
Tongue: English
Weight: 252 KB
Volume: 33
Category: Article
ISSN: 0044-8249
DOI: 10.1002/anie.199400671

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✦ Synopsis

An important step forward in the search for catalytically active polynuclear metal complexes has been made by George G. Stanley's group: The bimetallic complex cations r~c-[Rh,(nbd),L]~+ l r and rne~o-[Rh,(nbd),L]~+ l m (nbd = norbornadiene) which were isolated as tetrafluoroborates (Scheme l),[l1 were obtained by reacting bis(norbornadiene)rhodium tetrafluoroborate with a new tetraphosphane ligand L which exists in R,R, S,S and R,S forms and can be separated into racemic (R,R/S,S) and meso structures (R,S).['] r a c -( R . R / Et , P -Rh Rh -PEt, Et\ /pEt2 <jWP, 'J /pvp\ph Ph Ph Ph r a c -l r meso-(R,S)-L Scheme 1. The tetrdphosphdne ligand L and the hydroformylation-active dirhodium complex I r .

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