Synthesis and reactivity of two-coordinate Ni(I) alkyl and aryl complexes.
Reaction of [(IPr)Ni(μ-Cl)]2 (1-Cl; IPr = 1,3-bis(2,6-diisopropylphenyl)imidazolin-2-ylidene) with ClMg{CH(SiMe3)2}·Et2O affords (IPr)Ni{CH(SiMe3)2} (2), a two-coordinate Ni(I) alkyl complex. An analogous two-coordinate aryl derivative, (IPr)Ni(dmp) (dmp = 2,6-dimesitylphenyl), can be similarly prepared from Li(dmp) and 1-Cl. Reaction of 2 with alkyl bromides gives the three-coordinate Ni(II) alkyl halide complex (IPr)Ni{CH(SiMe3)2}Br. Evidence for a radical mechanism is presented to explain the reaction of 2 with alkyl halides.
Gordon Center for Integrative Science, Department of Chemistry, The University of Chicago , Chicago, Illinois 60637, United States.
Carl A
CA
Laskowski
Donald J
DJ
Bungum
Steven M
SM
Baldwin
Sarah A
SA
Del Ciello
Vlad M
VM
Iluc
Gregory L
GL
Hillhouse