Accessing Chelating Extended Linker Bis(NHC) Palladium(II) Complexes: Sterically Triggered Divergent Reaction Pathways
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https://figshare.com/articles/dataset/Accessing_Chelating_Extended_Linker_Bis_NHC_Palladium_II_Complexes_Sterically_Triggered_Divergent_Reaction_Pathways/9118412
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资源简介：
We
have demonstrated the profound effect that the N-substituent
steric bulk of ethylene-linked bis(N-heterocyclic
carbene) (bis(NHC)) species has on the mechanism of
their formation via Pd(OAc)2-assisted deprotometalations.
The binding mode of an ethylene-linked bis(NHC) ligand is chelating
when it bears N-2,4-Me2C6H3 substituents but forms a mono(NHC) with a pendant imidazolium
group for N-2,6-iPr2C6H3. An N-mesityl-substituted bis(NHC),
with steric bulk intermediate between the two aforementioned substituents,
generates a mixture of two chelating homoleptic normal/normal and
heteroleptic normal/abnormal bis(NHC) complexes, as predicted by DFT
calculations. Interestingly, the latter was seen to undergo facile
reductive elimination, affording a novel tricyclic monodentate NHC
ligand.
创建时间：
2019-07-26
