Sulfonated diphosphines and a process for their preparation

Details Sulfonated diphosphines and a process for their preparation Sulfonated diphosphines and a process for their preparation

1996-02-21

1997-11-04

Conrad, Joseph

Organic compounds -- part of the class 532-570 series

Organic compounds

Sulfonic acids or salts thereof

C07C30935

Patent

active

056841825

ABSTRACT:
The present invention relates to sulfonated diphosphines of the formula (I) ##STR1## where M is hydrogen, ammonium, a monovalent metal or the equivalent of a polyvalent metal, a, b, c and d are each 0 or 1, with the proviso that a+b+c+d is an integer from 1 to 4, Ar is an m-(MSO.sub.3)--C.sub.6 H.sub.4 radical and M is as defined above, n is 0, 1 or 2, Ph is a phenyl radical, R.sup.1 and R.sup.2 are identical or different and are each an alkyl radical having from 1 to 10 carbon atoms or a cycloaliphatic radical having from 5 to 10 carbon atoms in the ring, and a process for their preparation.

REFERENCES:
patent: 5274183 (1993-12-01), Herrman et al.
patent: 5347045 (1994-09-01), Herrmann et al.
patent: 5481045 (1996-01-01), Herrmann et al.

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