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Issue 44, 2011
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Substitution matters: isolating phosphorus diiminopyridine complexes

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The direct reactions of PI3 with –H or –C6H5 substituted diiminopyridine ligands yield the N,N′,N′′-chelated P(I) cations. The analogous chemistry with the ubiquitous –CH3 substituted derivative produces a complex mixture of products underscoring the importance of the substitution on the α-carbon atom. The I3 counteranion of the compounds could be easily exchanged with the more robust B12Cl122 dianion. Reactions of PCl3 and PBr3 with –CH3 and –C6H5 substituted ligands led to indiscernible mixtures or no reaction. However, heating PBr3 with the –H derivative in the presence of a halide trap produced the corresponding phosphorus(I) cation as the bromide salt. These species represent the first phosphorus diiminopyridine complexes reported.

Graphical abstract: Substitution matters: isolating phosphorus diiminopyridine complexes

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The article was received on 13 Jun 2011, accepted on 31 Aug 2011 and first published on 10 Oct 2011

Article type: Paper
DOI: 10.1039/C1DT11111F
Citation: Dalton Trans., 2011,40, 11976-11980
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    Substitution matters: isolating phosphorus diiminopyridine complexes

    C. D. Martin and P. J. Ragogna, Dalton Trans., 2011, 40, 11976
    DOI: 10.1039/C1DT11111F

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