Substituted diphosphines and a process for their preparation
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United States of America Patent
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Dec 8, 1998
Grant Date -
N/A
app pub date -
Apr 17, 1997
filing date -
May 15, 1996
priority date (Note) -
Expired
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Abstract
New diphosphines in the form of ammonium carboxylates, sulfonates or phosphonates having a singly or multiply charged diphosphine anion and the corresponding number of ammonium cations as counter ions, and a process for their preparation useful as ligand in rhodium catalyst systems for hydroformylation of olefins.
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