Arrays of P=O dipoles as a recurrent structural motif in bis-diphenylphosphine oxides, established from powder x-ray diffraction

Gin Keat Lim, Zhongfu Zhou, Kotaro Fujii, Patrizia Calcagno, Emilio Tedesco, Simon J. Kitchin, Benson M. Kariuki, Douglas Philp, Kenneth D.M. Harris

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Rationalization of the solid-state structural properties of odd members (n = 3, 5, 7) of the series Ph2P(O)(CH2)nP(O) Ph2 leads to insights concerning the structural determinants of this class of material, particularly with regard to the formation of preferred arrangements of P=O dipoles. The odd members of this series are recalcitrant to the formation of single crystals of suitable size and quality for single-crystal X-ray diffraction, and modern techniques for carrying out crystal structure determination directly from powder X-ray diffraction data were essential for determining the structural properties of these materials. In the present work, nonsolvate crystal phases of the materials with n = 3 and 5 were prepared by appropriate solid-state desolvation processes (starting from hydrate and toluene solvate phases, respectively), yielding microcrystalline powders of the nonsolvate phase in each case. Structure determination was carried out directly from powder X-ray diffraction data, employing the direct-space genetic algorithm technique for structure solution followed by Rietveld refinement.

Original languageEnglish (US)
Pages (from-to)3814-3818
Number of pages5
JournalCrystal Growth and Design
Volume10
Issue number8
DOIs
StatePublished - Aug 4 2010

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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