4-methyl nickel complex

CjHjS, Thiophene, tetrahydro-gold complexes, 26 85-87 C4H,NO, 2-Propenamide, 2-methyl-nickel complex, 26 205 C4H1()02, Ethane, 1,2-dimethoxy-solvates of chromium, molybdenum, and tungsten carbonyl cyclopentadienyl complexes, 6 343 tungsten complex, 26 50 ytterbium complex, 26 22 C4H i02.NaC5H5, Ethane, 1,2-dimethoxy-compd. with cyclopentadienylsodium, 26 341... 

NO, Nitrosyls, molybdenum and tungsten, 26 132, 133 NOC, Cyanate tungsten complex, 26 42 NOC4H7, 3-Butenamide nickel complex, 26 206 NOC4H , 2-Propenamide, 2-methyl-nickel complex, 26 205 NOC H, Benzoyl isocyanide chromium complex, 26 32, 34, 35 N04ReC16H, Perrhenate, tetrabutylam-monium, 26 391... 

Although the triethylphosphine complexes of nickel(H) may not necessarily represent optimum examples of catalysts,(12)(13) they allowed us access to the key intermediate, viz., tHe siryl-methyl-nickel complexes such as la and b. Any catalytic cycle... 

Alkylation of dibromobis(triethylphosphine)nickel(II) has been conducted stepwise using arylmagnesium bromide and methyllithium, leading to unsymmetrical /ra/7.y-aryl(methyl)nickel complex 5 [24], which further reacts with l,2-bis(dimethyl-phosphino)ethane (dmpe) to give ra-aryl(methyl)nickel complex 6 (eq (15)) [25]. 

C5H15O3P, Triethyl phosphite, iron complex, 26 61, 28 171 nickel complexes, 28 101, 104-106 CjHijP, Phosphine, triethyl-, gold-osmium complexes, 27 209, 211 gold-platinum complex, 27 218 nickel complex, 28 101 platinum complexes, 26 126, 135-140, 27 32, 34,28 27, 120, 122, 133, 29 191 C5H16N4, l,2-Ethanediamine,AfJVJV Af -tetramethyl-, lithium complex, 26 148 CjH,6P2, Phosphine, l,2-ethanediylbis(di-methyl-, nickel complex, 28 101 CjHijSi, Silane, triethyl-, ruthenium complex, 26 269... 

P2B02PtC4oH57, Platinum(II). (3-methoxy-3-oxo-KO-propyl-KC )bis(triethylphos-phine)-, tetraphenylborate(l-), 26 138 P2BPtC44Ht3, Platinum(ll), (q -cyclo-octene)bis(triethylphosphine)-, tetra-phenylborate( 1 —), 26 139 P2C4H 4, Phosphine, 12-ethanediylbis(di-methyl-, nickel complex, 28 101 P2C25H22. Phosphine, methylenebis(di-phenyl-, palladium complex, 28 340 ruthenium complex, 26 276,28 225 P2C26H20, Phosphine, ethynnediylbis(di-phenyl-, ruthenium complex, 26 277, 28 226... 

NOC4H9,2-Propenamide, 2-methyl-, nickel complex, 26i20S... 

The methyl nickel complex [NiMecp(PPhj)] reacts with cyclohexyl isonitrile to give the insertion product ... 

The reason for the striking difference between methyl- and phenyl-nickel complexes is not obvious at this time. It does serve notice, however, that generalizations about these reactions may be tenuous at best, and suggests that ample evidence be accumulated before making any generalizations. 

In the reaction of Ni(CNBu )4 and methyl iodide oligomerization of the isocyanide was observed the only isolable nickel complex was (I), shown below. This product is believed to arise through sequential insertions of three isocyanides into a nickel-carbon bond. Upon further treatment with additional isocyanide at a temperature greater than 60° C one obtains a polymer (RNC) presumably through multiple isocyanide insertion reactions. The addition of benzoyl chloride to Ni(CNBu )4 gave two isolable compounds Ni(CNBu )3(COPh)Cl (74%) and (II) (8.2%). This latter reaction, and the isolation of (II) in particular, suggests that the proposed mechanism for polymerization of isocyanides is reasonable. 

Methylation of aldehydes with trimethylaluminum is catalyzed by nickel complexes (Equation (80)).438 Phosphine or phosphite ligands considerably accelerate the reactions. 

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