Packing considerations of 10-oxa-9-bora­phenanthrene derivatives

The crystal structures of three products of the reaction of 2-phenyl­phenol and BCl₃ have been determined. The structures show intriguing packing patterns and an inter­esting case of pseudosymmetry. In addition, one of the two polymorphs has a primitive monoclinic crystal system, but it is twinned and emulates an ortho­rhom­bic C-centred structure.