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atoms and said radicals may be the same or different, while the preferred alkylene radicals of X may contain from 2 to 18 carbon atoms and the preferred alkylene radicals of R 7 may contain from 5 to 18 carbon atoms. In addition, pref› erably the divalent AI radicals and divalent aryl radicals of X of the above formulas are phenylene radicals in which the bridging group represented by --{CH$_{2}$ ) $_{1}$--{Q)m--{CH$_{2}$ ) 1 - is bonded to said phenylene radicals in positions that are ortho to the oxygen atoms of the formulas that connect the phenylene radicals to their phosphorus atom of the formulae. It is also preferred that any substituent radical when present on such phenylene radicals be bonded in the para and/or ortho position of the phenylene radicals in relation to the oxygen atom that bonds the given substituted phenylene radical to its phosphorus atom. 1 2 • 6 , 7 , 8 , W, X. Q and AI 

Of course any of the R • R R R R radicals of such organophosphites of Formulas (I) to (XI) above may be substituted if desired, with any suitable substituent containing from 1 to 30 carbon atoms that does not unduly adversely affect the desired result of the process 20 of this invention. Substituents that may be on said radicals in addition of course to corresponding hydrocarbon radicals such as alkyl, aryl. aralkyl. alkaryl and cyclohexyl substituents, may include for example silyl radicals such as -Si(R 10 ) 3 ; amino radicals such as -N(R $^{10}$h; phosphine 25 radicals such as -aryl-P(R 10 h; acyl radicals such as --C(O) R $^{10 }$acyloxy radicals such as -OC(O)R 10 ; amido radicals such as --CON(R 10 h and -N(R $^{1}$°)COR 10 ; sulfonyl radi› cals such as -SO~ 10 , alkoxy radicals such as --OR 10 ; sulfinyl radicals such as -SOR 10 , sulfenyl radicals such as 30 -SR 10 , phosphonyl radicals such as -P(O)(R 10 ) 2 , as well as halogen, nitro. cyano, trifluoromethyl. hydroxy radicals, and the like, wherein each R $^{10 }$radical individually repre› sents the same or different monovalent hydrocarbon radical having from 1 to 18 carbon atoms (e.g .. alkyl, aryl. aralkyL 35 alkacyl and cyclohexyl radicals), with the proviso that in amino substituents such as -N(R $^{1}$°) 2 each R 10 taken together can also represent a divalent bridging group that forms a heterocyclic radical with the nitrogen atom, and in amido substituents such as --C(O)N(R 10 h and -N(R $^{1}$°) COR $^{10 }$each R $^{10 }$bonded to N can also be hydrogen. Of course it is to be understood that any of the substituted or unsubstituted hydrocarbon radicals groups that make up a particular given organophosphite may be the same or dif› ferent. include 

More specifically illustrative substituents primary, secondary and tertiary alkyl radicals such as methyl. ethyl. n-propyl, isopropyl, butyl, sec-butyl. t-butyl, neo-pentyl. n-hexyl. amyl, sec-amyl, t-amyl, iso-octyl. decyl, octadecyl, and the like; aryl radicals such as phenyl. naphthyl and the like; aralkyl radicals such as benzyl, phenylethyl. triphenylmethyl, and the like; alkacyl radicals such as tolyl. xylyl, and the like; alicyclic radicals such as cyclopentyl, cyclohexyl. 1-methylcyclohexyl. cyclooctyl, cyclohexylethyl, and the like; alkoxy radicals such as methoxy, ethoxy, propoxy, t-butoxy, --OCH$_{2}$ CH$_{2}$ OCH$_{3}$ , -O(CH$_{2}$ CH$_{2}$ hOCH$_{3}$ , -O(CH$_{2}$ CH$_{2}$ hOCH$_{3}$ , and the like; aryloxy radicals such as phenoxy and the like; as well as silyl radicals such as $_{-Si(CH$_{3}$}$h, $_{-Si(OCH$_{3}$}$h, -Si(C$_{3}$ H$_{7}$ h, and the like; amino radicals such as -NH$_{2}$ • $_{-N(CH$_{3}$}$h, -NHCH$_{3}$ , -NH(C$_{2}$ H$_{5}$ ). and the like; arylphosphine radicals such as -P(C$_{6}$ H$_{5}$ h, and the like; acyl radicals such as --C(O)CH$_{3}$ , --C(O)C$_{2}$ H$_{5}$ • --C(O) C$_{6}$H$_{5}$ , and the like; carbonyloxy radicals such as --C(O) OCH$_{3 }$ and the like; oxycarbonyl radicals such as -O(CO) C$_{6}$H$_{5}$ , and the like; amido radicals such as --CONH$_{2}$ , $_{--CON(CH$_{3}$}$h, -NHC(O)CH$_{3}$ • and the like; sulfonyl radi- 

cals such as -S(O)$_{2}$ C$_{2}$H$_{5 }$ and the like; sulfinyl radicals such as -S(O)CH$_{3 }$ and the like; sulfenyl radicals such as -SCH$_{3}$ , -SC$_{2}$ H$_{5}$ , -SC$_{6}$ H$_{5}$ • and the like; phosphonyl radicals such as -P(O)(C$_{6}$ H$_{5}$ h, -P(O)(CH$_{3}$ h, -P(O)(C$_{2 }$ H$_{5}$ h, -P(O)(C$_{3}$ H1h, -P(O)(C4H$_{9}$ ) 2 , -P(O)(C$_{6}$ H$_{13}$ )z, -P(O)CHiC$_{6}$ H$_{5}$ ). -P(O)(H)(C$_{6}$ H$_{5}$ ), and the like. 

Specific illustrative examples of such organophosphite ligands include the following: 

2-t-butyl-4-methoxyphenyl(3 3’ -di-t-butyl-5 .5’-dimethoxy› L 1 ’-biphenyl-2.2’ -diyl)phosphite having the formula: 

<img src='content_image/940444.jpg'>

methyl(3,3’ -di-t-butyl-5 .5’ -dimethoxy-l, l ’-biphenyl-2,2’› diyl)phosphite having the formula: 

<img src='content_image/940445.jpg'>

6,6’-[ [ 4,4’ -bis( 1, 1-dimethylethyl)-[ 1,1 ’-binaphthyl]-2,2’ - diyl ]bis( oxy) ]bis-dtbenzo[ d,f] [ 1,3 .2 ]-dioxaphosphepin hav› ing the formula: 

<img src='content_image/940446.jpg'>

6,6’-[[3,3’-bis( 1,l-dimethylethyl)-5.5’-dimethoxy-[ 1.1 ’› biphenyl]-2.2’ -diyl]bis( oxy)]bis-dibenzo[ d,f] [ 1.3.2] dioxaphosphepin having the formula: 

Ligand B 

