A subject of the present invention is new 6,6'-bis-(1-phosphanorbornadiene) diphosphines, their preparation process and their use in asymmetrical catalysis. The new diphosphines correspond to general formula (I): ##STR1##

Een onderwerp van de onderhavige uitvinding is nieuwe (1phosphanorbornadiene) diphosphines 6,6'-BIB, hun voorbereidingsproces en hun gebruik in asymmetrische katalyse. Nieuwe diphosphines beantwoorden aan algemene formule (I): ## STR1 ##

 
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