ja4095236_si_002.cif (77.43 kB)
Synthesis and Reactivity of Two-Coordinate Ni(I) Alkyl and Aryl Complexes
dataset
posted on 2013-12-11, 00:00 authored by Carl A. Laskowski, Donald J. Bungum, Steven M. Baldwin, Sarah A. Del Ciello, Vlad M. Iluc, Gregory L. HillhouseReaction
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.
