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Acta Crystallogr E Crystallogr Commun. 2015 Apr 22;71:523-7. doi: 10.1107/S2056989015006994. eCollection 2015 May 01.

Crystal structures of 1-(4-chloro-phen-yl)-2-(di-phenyl-phosphor-yl)ethan-1-one and 1-(di-phenyl-phosphor-yl)-3,3-di-methyl-butan-2-one.

Acta crystallographica. Section E, Crystallographic communications

Erin G Leach, Alyssa A Kulesza, Richard J Staples, Shannon M Biros

Affiliations

  1. Department of Chemistry, Grand Valley State University, 1 Campus Dr., Allendale, MI 49401, USA.
  2. Center for Crystallographic Research, Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, MI 48824, USA.

PMID: 25995871 PMCID: PMC4420131 DOI: 10.1107/S2056989015006994

Abstract

The title compounds, C20H16ClO2P, (I), and C18H21O2P, (II), were synthesized via an Arbuzov reaction between an α-bromo-ketone and isopropoxydi-phenyl-phosphane. In the crystals of both compounds, mol-ecules are linked via bifurcated C-H⋯(O,O) hydrogen bonds, forming chains propagating along [100] for (I) and along [010] for (II). The chains are linked via C-H⋯π inter-actions, leading to the formation of sheets lying parallel to (010) for (I) and (001) for (II). The absolute structure of compound (II) was determined by resonant scattering [Flack parameter = 0.088 (14)].

Keywords: C—H⋯O hydrogen bonds; C—H⋯π inter­actions; carbamoyl­methyl­phosphane oxide (CMPO); crystal structure; isopropoxydi­phenyl­phosphane; α-bromo­ketone

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