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Issue 25, 2018
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New synthetic strategies leading to [RNPNR] anions and the isolation of the [P(Nt-Bu)3]3− trianion

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Abstract

New and straightforward synthetic paths for the syntheses of [RNPNR] anions (R = t-Bu (1) or CPh3 (6)) in the form of their tmeda- or thf-coordinated lithium salts are described. The attempts to isolate the sodium analogue [(Ph3CNPNCPh3)Na·(thf)x] (8) remained unsuccessful probably due to its high reactivity although its formation in the reaction of the parent cis-[(Ph3CNP)2(Ph3CNH)2] (5) with 2 eq. of sodium naphthalenide was corroborated by NMR spectroscopy. Importantly, when an excess of sodium naphthalenide was used in the reaction with 5, [(Ph3C)Na(thf)3] (9) was obtained along with a complex mixture of other by-products indicating the cleavage of the C–N bond in the starting material. Furthermore, the synthesis and the structural characterization of the [P(Nt-Bu)3]3− trianion as its trilithium salt [P(Nt-Bu)3Li3]2 (10) has been successfully achieved.

Graphical abstract: New synthetic strategies leading to [RNPNR]− anions and the isolation of the [P(Nt-Bu)3]3− trianion

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Publication details

The article was received on 25 May 2018, accepted on 29 May 2018 and first published on 30 May 2018


Article type: Paper
DOI: 10.1039/C8DT02141D
Citation: Dalton Trans., 2018,47, 8434-8441
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    New synthetic strategies leading to [RNPNR] anions and the isolation of the [P(Nt-Bu)3]3− trianion

    J. Vrána, R. Jambor, A. Růžička and L. Dostál, Dalton Trans., 2018, 47, 8434
    DOI: 10.1039/C8DT02141D

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