| abstract |
The invention relates to a bisphosphite of the formula I n n n n n n n n n n where X=a divalent substituted or unsubstituted bisalkylene or bisarylene radical, Y=a divalent substituted or unsubstituted bisarylene or bisalkylene radical, Z=oxygen or NR 9 , and R 1 , R 2 , R 3 , R 4 are identical or different, substituted or unsubstituted, linked, unlinked or fused aryl or heteroaryl radicals and R 9 is hydrogen or a substituted or unsubstituted alkyl or aryl radical, a process for preparing it and also the use of this phosphite in catalysis in particular in the catalytic hydroformylation of olefins or organic compounds having C—C double bonds. |