Nontrigonal constraint enhances 1,2-addition reactivity of phosphazenes.

ABSTRACT: The syntheses and 1,2-addition reactivities of nontrigonal phosphazenes supported by trianionic tricoordinating chelates of the type L₃P[double bond, length as m-dash]Ndipp (3: L₃ = N[CHC( ^t Bu)O]₂ ^3-; 4: L₃ = N(o-NMeC₆H₄)₂ ^3-; dipp = 2,6-diisopropylphenyl) are reported. These compounds are characterized by multinuclear NMR and single-crystal X-ray diffraction experiments. Distorted phosphazenes 3 and 4 are shown to add B-H, B-O, and Si-H bonds across the formal P[double bond, length as m-dash]N double bond, and their reactivities are contrasted with acyclic analogues. Derivatives of phosphazene 3 bearing sterically unencumbered N

SUBMITTER: Lin YC 

PROVIDER: S-EPMC5944378 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature