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Synthesis and Crystal Structures of Anionic Gallium(II) and Gallium(III) Heterocyclic Compounds Derived from a Gallium(I) N-Heterocyclic Carbene Analogue

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Abstract

The addition of the N–H bond of the formamidine, ArN(H)C=NAr (Ar = C6H3Pr i2 -2,6), to the gallium(I) center of [K(tmeda)][:Ga(Ar-DAB)] (Ar-DAB={(Ar)NC(H)}2) yields K[(Ar-DAB)GaIII(H){N(Ar)C=NAr}] 1. The crystal structure of this and two other related anionic compounds, [K(18-crown-6)][(Ar-DAB)GaIII{N(H)N=Fl}{(H)Fl}] (Fl = fluorendiyl) 2 and [K(OEt2)3][(Ar-DAB)GaII(CH2Ph)GaII(Ar-DAB)] 3, have been determined. The cell parameters of the compounds are 1: P21/c, a = 20.2350(9), b = 14.1760(7), c = 19.6441(10), β = 111.307(1); 2: P21/c, a = 13.115(3), b = 21.799(4), c = 22.646(5), β = 90.20(3); 3: P21/n, a = 16.783(3), b = 21.635(4), c = 19.814(4), β = 92.34(3). The crystal structures of all complexes exhibit distorted tetrahedral gallium centers, and interactions between anion aryl substituents and the potassium cations.

Graphical Abstract

The crystal structures of three anionic gallium(II or III) heterocyclic compounds, derived from oxidation reactions of a gallium(I) heterocycle salt, [K(tmeda)][:Ga(Ar-DAB)] (Ar-DAB = {(C6H3Pr i2 -2,6)NC(H)}2), are reported.

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Notes

  1. As determined from a survey of the Cambridge Crystallographic Database, May, 2010.

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Acknowledgements

The authors gratefully acknowledge financial support from the Australian Research Council (Fellowships for CJ, AS and ER). The EPSRC Mass Spectrometry Centre, Swansea, UK, is also acknowledged.

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Authors and Affiliations

  1. School of Chemistry, Monash University, PO Box 23, Melbourne, VIC, 3800, Australia

    Cameron Jones, David P. Mills, Eric Rivard, Andreas Stasch & William D. Woodul

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  1. Cameron Jones
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  2. David P. Mills
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Correspondence to Cameron Jones.

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Jones, C., Mills, D.P., Rivard, E. et al. Synthesis and Crystal Structures of Anionic Gallium(II) and Gallium(III) Heterocyclic Compounds Derived from a Gallium(I) N-Heterocyclic Carbene Analogue. J Chem Crystallogr 40, 965–969 (2010). https://doi.org/10.1007/s10870-010-9772-0

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  • DOI: https://doi.org/10.1007/s10870-010-9772-0

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