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Heavier group 13 metal(I) heterocycles stabilized by sterically demanding diiminophosphinates: a structurally characterized monomer-dimer pair for gallium

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Author(s)

Andrew L. Hawley, C. André Ohlin, Lea Fohlmeister, Andreas Stasch

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Abstract

We have synthesized and characterized the monomeric diiminophosphinate-stabilized group 13 metal(I) complexes [DipLE:], DipL = Ph2P(NDip)2, Dip = 2,6-iPr2C6H3; E = Ga (1), In (2) and Tl (3). In addition, we structurally characterized the dimeric complex [(DipLGa)2], 12. Similar synthetic attempts using MesL = Ph2P(NMes)2, Mes = 2,4,6-Me3C6H2 afforded product mixtures from which the mixed oxidation state species [(MesL)3Ga4I3] 4 was isolated. [DipLGa:] 1 is converted with dry air to the gallium(III) oxide species [(DipLGaO)2] 5. Density Functional Theory studies on [DipLE:] and [(DipLE)2], E = Al-Tl, shed light on the bonding in these compounds and show that the newly formed E-E bonding interactions can be described as weak single σ-bond with no significant π-bonding contribution for E = Al, Ga. A large contribution to the dimer binding enthalpies results from London dispersion forces.
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Original languageEnglish
Pages (from-to)447-455
Number of pages9
JournalChemistry - A European Journal
Volume23
Issue number2
Early online date2 Dec 2016
DOIs
Publication statusPublished - 5 Jan 2017

    Research areas

  • Group 13 elements, Low valent main group compounds, Metal-metal interactions, N-ligands, O-O activation

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