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Issue 35, 2018
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2-Aminophenolate ligands for phosphorus(V): a lithium salt featuring the chiral [P(OC6H4NR)3] anion

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Phosphoranes P(OC6H4NR)2(OC6H4NHR) [R = Me (2a), Ph (2b), C6F5 (2c)] were synthesized by treating PCl5 with the respective 2-aminophenol derivative (1a–c, 3.1 equiv.). In one instance, an intermediate species, P(OC6H4NR)2Cl [R = Me (3a)], was isolated and structurally characterized. Deprotonation of the amine moieties (–N[H with combining low line]R) in phosphoranes 2a and 2b with a strong alkali–metal base (e.g. n-BuLi) in the presence of a strong-donor solvent (e.g. THF) afforded salts composed of the hexacoordinate P(V)-anions [P(OC6H4NR)3] (R = Me, [4a]; Ph, [4b]). Employing precursor 2a, the salt Li(THF)3fac-[4a] was isolated. The X-ray crystal of each enantiomer of [4a] was determined and, to our knowledge, represents the first structurally characterized example of a salt containing a hexacoordinate P(V)N3O3 anion featuring P(V)–N bonds.

Graphical abstract: 2-Aminophenolate ligands for phosphorus(v): a lithium salt featuring the chiral [P(OC6H4NR)3]− anion

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Publication details

The article was received on 21 Jun 2018, accepted on 19 Jul 2018 and first published on 01 Aug 2018

Article type: Paper
DOI: 10.1039/C8DT02522C
Citation: Dalton Trans., 2018,47, 12118-12129

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    2-Aminophenolate ligands for phosphorus(V): a lithium salt featuring the chiral [P(OC6H4NR)3] anion

    C. Zhan, Z. Han, B. O. Patrick and D. P. Gates, Dalton Trans., 2018, 47, 12118
    DOI: 10.1039/C8DT02522C

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