The title compounds, C20H16ClO2P, (I), and C18H21O2P, (II), were synthesized via an Arbuzov reaction between an α-bromoketone and isopropoxydiphenylphosphane. In the crystals of both compounds, molecules are linked via bifurcated C—H...(O,O) hydrogen bonds, forming chains propagating along  for (I) and along  for (II). The chains are linked via C—H...π interactions, 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)].
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Document Type: Research Article
Department of Chemistry, Grand Valley State University, 1 Campus Dr., Allendale, MI 49401, USA
Center for Crystallographic Research, Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, MI 48824, USA
January 1, 2015